556856658655 has 32 divisors (see below), whose sum is σ = 731158679808. Its totient is φ = 403775769600.

The previous prime is 556856658641. The next prime is 556856658661.

556856658655 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 556856658655 - 2⁵ = 556856658623 is a prime.

It is a super-2 number, since 2×556856658655² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27920847 + ... + 27940783.

It is an arithmetic number, because the mean of its divisors is an integer number (22848708744).

Almost surely, 2^556856658655 is an apocalyptic number.

556856658655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

556856658655 is a deficient number, since it is larger than the sum of its proper divisors (174302021153).

556856658655 is a wasteful number, since it uses less digits than its factorization.

556856658655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21447.

The product of its digits is 1296000000, while the sum is 70.

The spelling of 556856658655 in words is "five hundred fifty-six billion, eight hundred fifty-six million, six hundred fifty-eight thousand, six hundred fifty-five".