256376135564 has 12 divisors (see below), whose sum is σ = 448748599824. Its totient is φ = 128162249904.

The previous prime is 256376135537. The next prime is 256376135579. The reversal of 256376135564 is 465531673652.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6432119 + ... + 6471854.

It is an arithmetic number, because the mean of its divisors is an integer number (37395716652).

Almost surely, 2^256376135564 is an apocalyptic number.

It is an amenable number.

256376135564 is a deficient number, since it is larger than the sum of its proper divisors (192372464260).

256376135564 is a wasteful number, since it uses less digits than its factorization.

256376135564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12908944 (or 12908942 counting only the distinct ones).

The product of its digits is 13608000, while the sum is 53.

The spelling of 256376135564 in words is "two hundred fifty-six billion, three hundred seventy-six million, one hundred thirty-five thousand, five hundred sixty-four".