# factorion

> English word · Noun

## Definitions
1. A number that is equal to the sum of the factorials of its digits.

## Etymology
From factorial + -on, coined by Clifford A. Pickover.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/factorion