556646013 has 80 divisors (see below), whose sum is σ = 1070530560. Its totient is φ = 279741600.

The previous prime is 556646009. The next prime is 556646029. The reversal of 556646013 is 310646655.

556646013 is a `hidden beast` number, since 5 + 5 + 6 + 646 + 0 + 1 + 3 = 666.

It is not a de Polignac number, because 556646013 - 2² = 556646009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556646003) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 191908 + ... + 194786.

It is an arithmetic number, because the mean of its divisors is an integer number (13381632).

Almost surely, 2^556646013 is an apocalyptic number.

It is an amenable number.

556646013 is a deficient number, since it is larger than the sum of its proper divisors (513884547).

556646013 is a wasteful number, since it uses less digits than its factorization.

556646013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940 (or 2931 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 556646013 is about 23593.3467952302. The cubic root of 556646013 is about 822.6081997820.

The spelling of 556646013 in words is "five hundred fifty-six million, six hundred forty-six thousand, thirteen".