656323354525121 has 4 divisors (see below), whose sum is σ = 662457217651632. Its totient is φ = 650189491398612.

The previous prime is 656323354525117. The next prime is 656323354525127. The reversal of 656323354525121 is 121525453323656.

656323354525121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 656323354525121 - 2² = 656323354525117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656323354525127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3066931563095 + ... + 3066931563308.

It is an arithmetic number, because the mean of its divisors is an integer number (165614304412908).

Almost surely, 2^{656323354525121} is an apocalyptic number.

It is an amenable number.

656323354525121 is a deficient number, since it is larger than the sum of its proper divisors (6133863126511).

656323354525121 is a wasteful number, since it uses less digits than its factorization.

656323354525121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6133863126510.

The product of its digits is 19440000, while the sum is 53.

The spelling of 656323354525121 in words is "six hundred fifty-six trillion, three hundred twenty-three billion, three hundred fifty-four million, five hundred twenty-five thousand, one hundred twenty-one".