656455554656 has 24 divisors (see below), whose sum is σ = 1409887498824. Its totient is φ = 298388888320.

The previous prime is 656455554617. The next prime is 656455554691.

It is a happy number.

656455554656 is nontrivially palindromic in base 10.

656455554656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 932464925 + ... + 932465628.

It is an arithmetic number, because the mean of its divisors is an integer number (58745312451).

Almost surely, 2^656455554656 is an apocalyptic number.

It is an amenable number.

656455554656 is an abundant number, since it is smaller than the sum of its proper divisors (753431944168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

656455554656 is a wasteful number, since it uses less digits than its factorization.

656455554656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864930574 (or 1864930566 counting only the distinct ones).

The product of its digits is 324000000, while the sum is 62.

The spelling of 656455554656 in words is "six hundred fifty-six billion, four hundred fifty-five million, five hundred fifty-four thousand, six hundred fifty-six".