355693655479801
This number is a prime.
35569 3655479801
The sum of the digits 0-9 in ascending order in paired-sum factorials: (0 + 1)! + (2 + 3)! + (4 + 5)! + (6 + 7)! + (8 + 9)! = 355693655479801. [Post]
(There is one curio for this number that has not yet been approved by an editor.)
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