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A Duotrigintacentillion (1 Duotrigintacentillion) is 10 to the power of 399 (10^399). This is a stupendously astronomical number!

How many zeros in a Duotrigintacentillion?

There are 399 zeros in a Duotrigintacentillion.

What's before Duotrigintacentillion?

A Untrigintacentillion is smaller than a Duotrigintacentillion.

What's after Duotrigintacentillion?

A Trestrigintacentillion is larger than a Duotrigintacentillion.


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

Is Duotrigintacentillion the largest number?

Duotrigintacentillion 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.

Duotrigintacentillion written out

Duotrigintacentillion is written out as:


Big Numbers

This is just one of many really big numbers!

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