556515664 has 40 divisors (see below), whose sum is σ = 1094617440. Its totient is φ = 274055808.

The previous prime is 556515653. The next prime is 556515683. The reversal of 556515664 is 466515655.

It is a self number, because there is not a number n which added to its sum of digits gives 556515664.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821694 + ... + 822370.

It is an arithmetic number, because the mean of its divisors is an integer number (27365436).

Almost surely, 2^556515664 is an apocalyptic number.

It is an amenable number.

556515664 is a deficient number, since it is larger than the sum of its proper divisors (538101776).

556515664 is a wasteful number, since it uses less digits than its factorization.

556515664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387 (or 1381 counting only the distinct ones).

The product of its digits is 540000, while the sum is 43.

The square root of 556515664 is about 23590.5842233718. The cubic root of 556515664 is about 822.5439851078.

Subtracting from 556515664 its reverse (466515655), we obtain a palindrome (90000009).

The spelling of 556515664 in words is "five hundred fifty-six million, five hundred fifteen thousand, six hundred sixty-four".