256255564 has 24 divisors (see below), whose sum is σ = 456624000. Its totient is φ = 125811840.

The previous prime is 256255547. The next prime is 256255577. The reversal of 256255564 is 465552652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50629 + ... + 55459.

It is an arithmetic number, because the mean of its divisors is an integer number (19026000).

Almost surely, 2^256255564 is an apocalyptic number.

It is an amenable number.

256255564 is a deficient number, since it is larger than the sum of its proper divisors (200368436).

256255564 is a wasteful number, since it uses less digits than its factorization.

256255564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5073 (or 5071 counting only the distinct ones).

The product of its digits is 360000, while the sum is 40.

The square root of 256255564 is about 16007.9843828010. The cubic root of 256255564 is about 635.1716435165.

The spelling of 256255564 in words is "two hundred fifty-six million, two hundred fifty-five thousand, five hundred sixty-four".