I came across [this definition](https://jisho.org/search/%E6%AD%A3) of 正{せい}
and I can't fathom what purpose such a large number
(10,000,000,000,000,000,000,000,000,000,000,000,000,000) could serve, it looks
strange to me that there is even a particular kanji to represent it.

Do you know if there is any context or use for it?

How did 正 come to mean 10^40?
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2022-04-11T11:53:49.397
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question
etymology numbers
Is there any practical use of the word 正{せい} meaning 10^40 (ten thousand undecillion) ? Where did it come from?