What is the value of a quattuordecillion?

It depends on the number naming system. In the short scale (US, modern UK), it is 10^45 (1 followed by 45 zeros). In the long scale (historic UK, continental Europe), it is 10^84.

Would I ever need to use this number?

For everyday purposes, no. It is a specialist term used in advanced mathematics, theoretical physics, and for humorous exaggeration of large quantities.

What comes after quattuordecillion?

In the short scale sequence, the next number is quindecillion (10^48), followed by sexdecillion (10^51), and so on.

Is there a simpler way to say this number?

Yes. In scientific notation, '10^45' (short scale) or '10^84' (long scale) is clearer and avoids ambiguity. In informal contexts, 'an astronomically huge number' conveys the idea.

quattuordecillion

UK/ˌkwɒtʃʊəʊdɪˈsɪlɪən/US/ˌkwɑːtuoʊrdɪˈsɪljən/

Highly specialized; formal, technical

My Flashcards

Definition

Meaning

A cardinal number equal to 1 followed by 45 zeros (short scale) or 1 followed by 84 zeros (long scale).

An extremely large, often theoretical, numerical quantity, used primarily in mathematics, cosmology, and occasionally for hyperbolic emphasis.

Linguistics

Semantic Notes

Its value is system-dependent: in the short scale (used in US, UK modern English), it is 10^45. In the long scale (used in continental Europe), it is 10^84. Context is critical for exact value.

Dialectal Variation

British vs American Usage

Differences

Historically, UK used long scale; modern UK English predominantly follows US short scale for this term, especially in scientific contexts. The potential for confusion with the long scale meaning remains.

Connotations

Implies an incomprehensibly vast quantity; carries a formal, academic connotation.

Frequency

Extremely rare in all forms of English; its appearance is almost exclusively in specialist mathematics, theoretical physics, or playful hyperbole.

Vocabulary

Collocations

strong

a quattuordecillion ofone quattuordecillionseveral quattuordecillion

medium

approximately a quattuordecillionon the order of a quattuordecillionquattuordecillion particles

weak

almost a quattuordecillionnearly quattuordecillion-fold

Grammar

Valency Patterns

[Number] + quattuordecillion + of + [plural noun][Determiner] + quattuordecillion + [plural noun]

Vocabulary

Synonyms

Strong

an unimaginably vast numbera number beyond practical comprehension

Neutral

10^45 (short scale)an astronomically large number

Weak

a huge numbera colossal figure

Vocabulary

Antonyms

zeroonea handfula few

Phrases

Idioms & Phrases

“Not to be confused with a gazillion (which is informal and non-specific).”

Usage

Context Usage

Business

Virtually never used. Might appear in hyperbolic forecasts about theoretical market growth over millennia.

Academic

Used in pure mathematics, combinatorics, cosmology (e.g., estimating quantum states in a theoretical universe), and high-level number theory discussions.

Everyday

Only used for deliberate, humorous exaggeration, e.g., 'I've told you a quattuordecillion times!'

Technical

Precise usage in fields defining extremely large quantities, such as certain branches of physics or cryptography.

Examples

By Part of Speech

verb

British English

The theoretical model quattuordecillionises the possible states.
(Note: This word is not used as a verb; this is a forced, non-standard construction.)

American English

(Not used as a verb in standard English.)

adverb

British English

(Not used as an adverb in standard English.)

American English

(Not used as an adverb in standard English.)

adjective

British English

A quattuordecillion-particle system is purely a thought experiment.

American English

They proposed a quattuordecillion-dollar budget for the multi-galactic project—purely hypothetical.

Examples

By CEFR Level

(This word is far beyond A2 level.)

(This word is far beyond B1 level.)

The number of atoms in a star can be many orders of magnitude less than a quattuordecillion.

In the short scale system, a quattuordecillion represents 10^45, a scale relevant only to theoretical cosmology.

Learning

Memory Aids

Mnemonic

Think 'quattuor' (Latin for four) + 'decillion' (related to ten). It's the fourth '-illion' after 'decillion' in the sequence (undecillion, duodecillion, tredecillion, quattuordecillion).

Conceptual Metaphor

THE UNIVERSE IS A CONTAINER FOR NUMBERS; ABSTRACT LARGENESS IS PHYSICAL SIZE.

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

Do not translate directly. Russian uses the long scale system, where 'квадриллион' is 10^15. 'Quattuordecillion' has no direct common equivalent; it must be explained as 10^45 (short) or 10^84 (long).

Common Mistakes

Using it without specifying the scale (short/long).
Misspelling (e.g., 'quattuordecillian', 'quattordecillion').
Using it in a context where 'billion' or 'trillion' would be more conventional and understood.

Practice

Quiz

Fill in the gap

In modern American English, a quattuordecillion is written as 1 followed by zeros.

Multiple Choice

In which context is 'quattuordecillion' MOST appropriately used?

FAQ

Frequently Asked Questions

: It depends on the number naming system. In the short scale (US, modern UK), it is 10^45 (1 followed by 45 zeros). In the long scale (historic UK, continental Europe), it is 10^84.
: For everyday purposes, no. It is a specialist term used in advanced mathematics, theoretical physics, and for humorous exaggeration of large quantities.
: In the short scale sequence, the next number is quindecillion (10^48), followed by sexdecillion (10^51), and so on.
: Yes. In scientific notation, '10^45' (short scale) or '10^84' (long scale) is clearer and avoids ambiguity. In informal contexts, 'an astronomically huge number' conveys the idea.