256120564 has 12 divisors (see below), whose sum is σ = 512241184. Its totient is φ = 109765944.

The previous prime is 256120561. The next prime is 256120577. The reversal of 256120564 is 465021652.

256120564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

256120564 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256120561) 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, 4573554 + ... + 4573609.

Almost surely, 2^256120564 is an apocalyptic number.

It is an amenable number.

256120564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

256120564 is a wasteful number, since it uses less digits than its factorization.

256120564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9147174 (or 9147172 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 256120564 is about 16003.7671815107. The cubic root of 256120564 is about 635.0600840082.

The spelling of 256120564 in words is "two hundred fifty-six million, one hundred twenty thousand, five hundred sixty-four".