6140438907831 has 28 divisors (see below), whose sum is σ = 9690996666520. Its totient is φ = 3878171933040.

The previous prime is 6140438907763. The next prime is 6140438907949. The reversal of 6140438907831 is 1387098340416.

6140438907831 is a `hidden beast` number, since 6 + 1 + 40 + 438 + 90 + 7 + 83 + 1 = 666.

It is not a de Polignac number, because 6140438907831 - 2³¹ = 6138291424183 is a prime.

It is a super-2 number, since 2×6140438907831² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6140438909831) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 221646640 + ... + 221674341.

Almost surely, 2^{6140438907831} is an apocalyptic number.

6140438907831 is a deficient number, since it is larger than the sum of its proper divisors (3550557758689).

6140438907831 is an equidigital number, since it uses as much as digits as its factorization.

6140438907831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443321018 (or 443321003 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 6140438907831 in words is "six trillion, one hundred forty billion, four hundred thirty-eight million, nine hundred seven thousand, eight hundred thirty-one".