556661931972 has 24 divisors (see below), whose sum is σ = 1330557789792. Its totient is φ = 181028270400.

The previous prime is 556661931953. The next prime is 556661931983. The reversal of 556661931972 is 279139166655.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 565712854 + ... + 565713837.

It is an arithmetic number, because the mean of its divisors is an integer number (55439907908).

Almost surely, 2^556661931972 is an apocalyptic number.

It is an amenable number.

556661931972 is an abundant number, since it is smaller than the sum of its proper divisors (773895857820).

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

556661931972 is a wasteful number, since it uses less digits than its factorization.

556661931972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131426739 (or 1131426737 counting only the distinct ones).

The product of its digits is 18370800, while the sum is 60.

The spelling of 556661931972 in words is "five hundred fifty-six billion, six hundred sixty-one million, nine hundred thirty-one thousand, nine hundred seventy-two".