255616310631 has 32 divisors (see below), whose sum is σ = 384675321600. Its totient is φ = 149557927680.

The previous prime is 255616310623. The next prime is 255616310647. The reversal of 255616310631 is 136013616552.

It is not a de Polignac number, because 255616310631 - 2³ = 255616310623 is a prime.

It is a super-2 number, since 2×255616310631² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 255616310631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255616310611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11835915 + ... + 11857491.

It is an arithmetic number, because the mean of its divisors is an integer number (12021103800).

Almost surely, 2^255616310631 is an apocalyptic number.

255616310631 is a deficient number, since it is larger than the sum of its proper divisors (129059010969).

255616310631 is a wasteful number, since it uses less digits than its factorization.

255616310631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33999.

The product of its (nonzero) digits is 97200, while the sum is 39.

The spelling of 255616310631 in words is "two hundred fifty-five billion, six hundred sixteen million, three hundred ten thousand, six hundred thirty-one".