31305057564 has 72 divisors (see below), whose sum is σ = 81650338560. Its totient is φ = 9325569440.

The previous prime is 31305057527. The next prime is 31305057593. The reversal of 31305057564 is 46575050313.

It is a super-2 number, since 2×31305057564² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97044 + ... + 268379.

It is an arithmetic number, because the mean of its divisors is an integer number (1134032480).

Almost surely, 2^31305057564 is an apocalyptic number.

It is an amenable number.

31305057564 is an abundant number, since it is smaller than the sum of its proper divisors (50345280996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31305057564 is a wasteful number, since it uses less digits than its factorization.

31305057564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365511 (or 365498 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 39.

The spelling of 31305057564 in words is "thirty-one billion, three hundred five million, fifty-seven thousand, five hundred sixty-four".