256590474564 has 48 divisors (see below), whose sum is σ = 603343754496. Its totient is φ = 84868896000.

The previous prime is 256590474551. The next prime is 256590474587. The reversal of 256590474564 is 465474095652.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3881589 + ... + 3947139.

It is an arithmetic number, because the mean of its divisors is an integer number (12569661552).

Almost surely, 2^256590474564 is an apocalyptic number.

It is an amenable number.

256590474564 is an abundant number, since it is smaller than the sum of its proper divisors (346753279932).

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

256590474564 is a wasteful number, since it uses less digits than its factorization.

256590474564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68076 (or 68074 counting only the distinct ones).

The product of its (nonzero) digits is 36288000, while the sum is 57.

The spelling of 256590474564 in words is "two hundred fifty-six billion, five hundred ninety million, four hundred seventy-four thousand, five hundred sixty-four".