256642056352 has 48 divisors (see below), whose sum is σ = 551331222624. Its totient is φ = 116627104000.

The previous prime is 256642056347. The next prime is 256642056383. The reversal of 256642056352 is 253650246652.

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, 1395702 + ... + 1568842.

It is an arithmetic number, because the mean of its divisors is an integer number (11486067138).

Almost surely, 2^256642056352 is an apocalyptic number.

256642056352 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

256642056352 is an abundant number, since it is smaller than the sum of its proper divisors (294689166272).

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

256642056352 is a wasteful number, since it uses less digits than its factorization.

256642056352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177373 (or 177365 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 46.

The spelling of 256642056352 in words is "two hundred fifty-six billion, six hundred forty-two million, fifty-six thousand, three hundred fifty-two".