256556168 has 32 divisors (see below), whose sum is σ = 547594560. Its totient is φ = 111545280.

The previous prime is 256556159. The next prime is 256556203. The reversal of 256556168 is 861655652.

256556168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 61355 + ... + 65402.

It is an arithmetic number, because the mean of its divisors is an integer number (17112330).

Almost surely, 2^256556168 is an apocalyptic number.

It is an amenable number.

256556168 is an abundant number, since it is smaller than the sum of its proper divisors (291038392).

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

256556168 is a wasteful number, since it uses less digits than its factorization.

256556168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126797 (or 126793 counting only the distinct ones).

The product of its digits is 432000, while the sum is 44.

The square root of 256556168 is about 16017.3708204561. The cubic root of 256556168 is about 635.4199119803.

The spelling of 256556168 in words is "two hundred fifty-six million, five hundred fifty-six thousand, one hundred sixty-eight".