556617716655 has 64 divisors (see below), whose sum is σ = 1195755015168. Its totient is φ = 213527669760.

The previous prime is 556617716621. The next prime is 556617716723.

556617716655 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 556617716655 - 2¹⁰ = 556617715631 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18520374 + ... + 18550403.

It is an arithmetic number, because the mean of its divisors is an integer number (18683672112).

Almost surely, 2^556617716655 is an apocalyptic number.

556617716655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

556617716655 is an abundant number, since it is smaller than the sum of its proper divisors (639137298513).

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

556617716655 is a wasteful number, since it uses less digits than its factorization.

556617716655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37070816.

The product of its digits is 39690000, while the sum is 60.

The spelling of 556617716655 in words is "five hundred fifty-six billion, six hundred seventeen million, seven hundred sixteen thousand, six hundred fifty-five".