2256131236564 has 12 divisors (see below), whose sum is σ = 3948250096224. Its totient is φ = 1128059780504.

The previous prime is 2256131236553. The next prime is 2256131236573. The reversal of 2256131236564 is 4656321316522.

It is a congruent number.

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, 523144 + ... + 2187679.

It is an arithmetic number, because the mean of its divisors is an integer number (329020841352).

Almost surely, 2^{2256131236564} is an apocalyptic number.

It is an amenable number.

2256131236564 is a deficient number, since it is larger than the sum of its proper divisors (1692118859660).

2256131236564 is a wasteful number, since it uses less digits than its factorization.

2256131236564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2918894 (or 2918892 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 46.

The spelling of 2256131236564 in words is "two trillion, two hundred fifty-six billion, one hundred thirty-one million, two hundred thirty-six thousand, five hundred sixty-four".