556404404655 has 32 divisors (see below), whose sum is σ = 980255063808. Its totient is φ = 267250592000.

The previous prime is 556404404653. The next prime is 556404404659.

It is a happy number.

556404404655 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 556404404655 - 2¹ = 556404404653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556404404653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15740046 + ... + 15775355.

It is an arithmetic number, because the mean of its divisors is an integer number (30632970744).

Almost surely, 2^556404404655 is an apocalyptic number.

556404404655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

556404404655 is a deficient number, since it is larger than the sum of its proper divisors (423850659153).

556404404655 is a wasteful number, since it uses less digits than its factorization.

556404404655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31515527.

The product of its (nonzero) digits is 5760000, while the sum is 48.

The spelling of 556404404655 in words is "five hundred fifty-six billion, four hundred four million, four hundred four thousand, six hundred fifty-five".