556443864 has 64 divisors (see below), whose sum is σ = 1636610400. Its totient is φ = 174569472.

The previous prime is 556443791. The next prime is 556443913. The reversal of 556443864 is 468344655.

556443864 is a `hidden beast` number, since 5 + 564 + 4 + 3 + 86 + 4 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72097 + ... + 79440.

Almost surely, 2^556443864 is an apocalyptic number.

556443864 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

556443864 is an abundant number, since it is smaller than the sum of its proper divisors (1080166536).

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

556443864 is a wasteful number, since it uses less digits than its factorization.

556443864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151569 (or 151559 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 45.

The square root of 556443864 is about 23589.0623806882. The cubic root of 556443864 is about 822.5086095248.

The spelling of 556443864 in words is "five hundred fifty-six million, four hundred forty-three thousand, eight hundred sixty-four".