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A Octononagintillion (1 Octononagintillion) is 10 to the power of 297 (10^297). This is a tremendously astronomical number!

How many zeros in a Octononagintillion?

There are 297 zeros in a Octononagintillion.

What's before Octononagintillion?

A Septenonagintillion is smaller than a Octononagintillion.

What's after Octononagintillion?

A Novenonagintillion is larger than a Octononagintillion.


A Octononagintillionaire is someone whos assets, net worth or wealth is 1 or more Octononagintillion. It is unlikely anyone will ever be a true Octononagintillionaire. If you want to be a Octononagintillionaire, play Tap Tales!

Is Octononagintillion the largest number?

Octononagintillion is not the largest number. Infinity best describes the largest possible number - if there even is one! We cannot comprehend what the largest number actually is.

Octononagintillion written out

Octononagintillion is written out as:


Big Numbers

This is just one of many really big numbers!

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