556404404656 has 10 divisors (see below), whose sum is σ = 1078033534052. Its totient is φ = 278202202320.

The previous prime is 556404404653. The next prime is 556404404659. The reversal of 556404404656 is 656404404655.

It is an interprime number because it is at equal distance from previous prime (556404404653) and next prime (556404404659).

It is not an unprimeable number, because it can be changed into a prime (556404404653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17387637630 + ... + 17387637661.

Almost surely, 2^556404404656 is an apocalyptic number.

It is an amenable number.

556404404656 is a deficient number, since it is larger than the sum of its proper divisors (521629129396).

556404404656 is a wasteful number, since it uses less digits than its factorization.

556404404656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34775275299 (or 34775275293 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 49.

Subtracting 556404404656 from its reverse (656404404655), we obtain a palindrome (99999999999).

The spelling of 556404404656 in words is "five hundred fifty-six billion, four hundred four million, four hundred four thousand, six hundred fifty-six".