556631646 has 64 divisors (see below), whose sum is σ = 1214611200. Its totient is φ = 169376256.

The previous prime is 556631639. The next prime is 556631651. The reversal of 556631646 is 646136655.

It is a junction number, because it is equal to n+sod(n) for n = 556631598 and 556631607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 784740 + ... + 785448.

It is an arithmetic number, because the mean of its divisors is an integer number (18978300).

Almost surely, 2^556631646 is an apocalyptic number.

556631646 is an abundant number, since it is smaller than the sum of its proper divisors (657979554).

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

556631646 is a wasteful number, since it uses less digits than its factorization.

556631646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953.

The product of its digits is 388800, while the sum is 42.

The square root of 556631646 is about 23593.0423218372. The cubic root of 556631646 is about 822.6011225651.

The spelling of 556631646 in words is "five hundred fifty-six million, six hundred thirty-one thousand, six hundred forty-six".