256558116264 has 64 divisors (see below), whose sum is σ = 643463768640. Its totient is φ = 85243829760.

The previous prime is 256558116257. The next prime is 256558116289. The reversal of 256558116264 is 462611855652.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19123719 + ... + 19137129.

It is an arithmetic number, because the mean of its divisors is an integer number (10054121385).

Almost surely, 2^256558116264 is an apocalyptic number.

256558116264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

256558116264 is an abundant number, since it is smaller than the sum of its proper divisors (386905652376).

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

256558116264 is a wasteful number, since it uses less digits than its factorization.

256558116264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15930 (or 15926 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 51.

The spelling of 256558116264 in words is "two hundred fifty-six billion, five hundred fifty-eight million, one hundred sixteen thousand, two hundred sixty-four".