556464464656 has 20 divisors (see below), whose sum is σ = 1104446240604. Its totient is φ = 271446080000.

The previous prime is 556464464639. The next prime is 556464464663. The reversal of 556464464656 is 656464464655.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13943831056 + 542520633600 = 118084^2 + 736560^2 .

It is a junction number, because it is equal to n+sod(n) for n = 556464464594 and 556464464603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424133845 + ... + 424135156.

Almost surely, 2^556464464656 is an apocalyptic number.

It is an amenable number.

556464464656 is a deficient number, since it is larger than the sum of its proper divisors (547981775948).

556464464656 is a wasteful number, since it uses less digits than its factorization.

556464464656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848269050 (or 848269044 counting only the distinct ones).

The product of its digits is 248832000, while the sum is 61.

Subtracting 556464464656 from its reverse (656464464655), we obtain a palindrome (99999999999).

The spelling of 556464464656 in words is "five hundred fifty-six billion, four hundred sixty-four million, four hundred sixty-four thousand, six hundred fifty-six".