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A Seseptuagintillion (1 Seseptuagintillion) is 10 to the power of 231 (10^231). This is an extremely gargantuan number!

How many zeros in a Seseptuagintillion?

There are 231 zeros in a Seseptuagintillion.

What's before Seseptuagintillion?

A Quinseptuagintillion is smaller than a Seseptuagintillion.

What's after Seseptuagintillion?

A Septenseptuagintillion is larger than a Seseptuagintillion.


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

Is Seseptuagintillion the largest number?

Seseptuagintillion 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.

Seseptuagintillion written out

Seseptuagintillion is written out as:


Big Numbers

This is just one of many really big numbers!

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