2531563164656 has 20 divisors (see below), whose sum is σ = 4952524058352. Its totient is φ = 1253492439936.

The previous prime is 2531563164643. The next prime is 2531563164661. The reversal of 2531563164656 is 6564613651352.

It is a junction number, because it is equal to n+sod(n) for n = 2531563164598 and 2531563164607.

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, 768069701 + ... + 768072996.

Almost surely, 2^{2531563164656} is an apocalyptic number.

It is an amenable number.

2531563164656 is a deficient number, since it is larger than the sum of its proper divisors (2420960893696).

2531563164656 is a wasteful number, since it uses less digits than its factorization.

2531563164656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536142808 (or 1536142802 counting only the distinct ones).

The product of its digits is 11664000, while the sum is 53.

The spelling of 2531563164656 in words is "two trillion, five hundred thirty-one billion, five hundred sixty-three million, one hundred sixty-four thousand, six hundred fifty-six".