556868655 has 64 divisors (see below), whose sum is σ = 1167974400. Its totient is φ = 246343680.

The previous prime is 556868623. The next prime is 556868657.

556868655 is a `hidden beast` number, since 556 + 8 + 6 + 86 + 5 + 5 = 666.

556868655 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 556868655 - 2⁵ = 556868623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556868657) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19791 + ... + 38799.

It is an arithmetic number, because the mean of its divisors is an integer number (18249600).

Almost surely, 2^556868655 is an apocalyptic number.

556868655 is an abundant number, since it is smaller than the sum of its proper divisors (611105745).

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

556868655 is a wasteful number, since it uses less digits than its factorization.

556868655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19061 (or 19055 counting only the distinct ones).

The product of its digits is 8640000, while the sum is 54.

The square root of 556868655 is about 23598.0646452204. The cubic root of 556868655 is about 822.7178581754.

The spelling of 556868655 in words is "five hundred fifty-six million, eight hundred sixty-eight thousand, six hundred fifty-five".