402687374631 has 64 divisors (see below), whose sum is σ = 596003520000. Its totient is φ = 240820231680.

The previous prime is 402687374597. The next prime is 402687374651. The reversal of 402687374631 is 136473786204.

It is not a de Polignac number, because 402687374631 - 2⁷ = 402687374503 is a prime.

It is a super-2 number, since 2×402687374631² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402687374651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35184996 + ... + 35196438.

It is an arithmetic number, because the mean of its divisors is an integer number (9312555000).

Almost surely, 2^402687374631 is an apocalyptic number.

402687374631 is a deficient number, since it is larger than the sum of its proper divisors (193316145369).

402687374631 is a wasteful number, since it uses less digits than its factorization.

402687374631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11904.

The product of its (nonzero) digits is 4064256, while the sum is 51.

The spelling of 402687374631 in words is "four hundred two billion, six hundred eighty-seven million, three hundred seventy-four thousand, six hundred thirty-one".