256423135564 has 24 divisors (see below), whose sum is σ = 450921639168. Its totient is φ = 127588529040.

The previous prime is 256423135561. The next prime is 256423135571. The reversal of 256423135564 is 465531324652.

256423135564 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (256423135561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10662057 + ... + 10686079.

It is an arithmetic number, because the mean of its divisors is an integer number (18788401632).

Almost surely, 2^256423135564 is an apocalyptic number.

It is an amenable number.

256423135564 is a deficient number, since it is larger than the sum of its proper divisors (194498503604).

256423135564 is a wasteful number, since it uses less digits than its factorization.

256423135564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36885 (or 36883 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 46.

The spelling of 256423135564 in words is "two hundred fifty-six billion, four hundred twenty-three million, one hundred thirty-five thousand, five hundred sixty-four".