256553872 has 20 divisors (see below), whose sum is σ = 500705676. Its totient is φ = 127339520.

The previous prime is 256553863. The next prime is 256553879. The reversal of 256553872 is 278355652.

256553872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 147476736 + 109077136 = 12144^2 + 10444^2 .

It is not an unprimeable number, because it can be changed into a prime (256553879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56329 + ... + 60712.

Almost surely, 2^256553872 is an apocalyptic number.

It is an amenable number.

256553872 is a deficient number, since it is larger than the sum of its proper divisors (244151804).

256553872 is a wasteful number, since it uses less digits than its factorization.

256553872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117186 (or 117180 counting only the distinct ones).

The product of its digits is 504000, while the sum is 43.

The square root of 256553872 is about 16017.2991481086. The cubic root of 256553872 is about 635.4180164520.

The spelling of 256553872 in words is "two hundred fifty-six million, five hundred fifty-three thousand, eight hundred seventy-two".