256442357584 has 40 divisors (see below), whose sum is σ = 575615251520. Its totient is φ = 108398331648.

The previous prime is 256442357519. The next prime is 256442357623. The reversal of 256442357584 is 485753244652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15674454 + ... + 15690805.

It is an arithmetic number, because the mean of its divisors is an integer number (14390381288).

Almost surely, 2^256442357584 is an apocalyptic number.

It is an amenable number.

256442357584 is an abundant number, since it is smaller than the sum of its proper divisors (319172893936).

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

256442357584 is a wasteful number, since it uses less digits than its factorization.

256442357584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31365347 (or 31365341 counting only the distinct ones).

The product of its digits is 32256000, while the sum is 55.

The spelling of 256442357584 in words is "two hundred fifty-six billion, four hundred forty-two million, three hundred fifty-seven thousand, five hundred eighty-four".