556872278655 has 128 divisors (see below), whose sum is σ = 1127009894400. Its totient is φ = 228078259200.

The previous prime is 556872278653. The next prime is 556872278713.

556872278655 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 556872278655 - 2¹ = 556872278653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556872278653) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 31960536 + ... + 31977954.

It is an arithmetic number, because the mean of its divisors is an integer number (8804764800).

Almost surely, 2^556872278655 is an apocalyptic number.

556872278655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

556872278655 is an abundant number, since it is smaller than the sum of its proper divisors (570137615745).

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

556872278655 is a wasteful number, since it uses less digits than its factorization.

556872278655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17845.

The product of its digits is 282240000, while the sum is 66.

The spelling of 556872278655 in words is "five hundred fifty-six billion, eight hundred seventy-two million, two hundred seventy-eight thousand, six hundred fifty-five".