656626561444 has 12 divisors (see below), whose sum is σ = 1313253122944. Its totient is φ = 281411383464.

The previous prime is 656626561439. The next prime is 656626561457. The reversal of 656626561444 is 444165626656.

656626561444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

656626561444 is an admirable number.

It is a super-2 number, since 2×656626561444² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

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, 11725474284 + ... + 11725474339.

Almost surely, 2^656626561444 is an apocalyptic number.

It is an amenable number.

656626561444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

656626561444 is a wasteful number, since it uses less digits than its factorization.

656626561444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23450948634 (or 23450948632 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 55.

The spelling of 656626561444 in words is "six hundred fifty-six billion, six hundred twenty-six million, five hundred sixty-one thousand, four hundred forty-four".