556972645636 has 27 divisors (see below), whose sum is σ = 1071398387143. Its totient is φ = 253161921320.

The previous prime is 556972645631. The next prime is 556972645673. The reversal of 556972645636 is 636546279655.

The square root of 556972645636 is 746306.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556972645631) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 16401771 + ... + 16435693.

Almost surely, 2^556972645636 is an apocalyptic number.

556972645636 is the 746306-th square number.

It is an amenable number.

556972645636 is a deficient number, since it is larger than the sum of its proper divisors (514425741507).

556972645636 is an frugal number, since it uses more digits than its factorization.

556972645636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67872 (or 33936 counting only the distinct ones).

The product of its digits is 244944000, while the sum is 64.

Multiplying 556972645636 by its sum of digits (64), we get a square (35646249320704 = 5970448²).

The spelling of 556972645636 in words is "five hundred fifty-six billion, nine hundred seventy-two million, six hundred forty-five thousand, six hundred thirty-six".