556423303324655 has 16 divisors (see below), whose sum is σ = 719163659371584. Its totient is φ = 410843754720000.

The previous prime is 556423303324643. The next prime is 556423303324703.

556423303324655 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 556423303324655 - 2¹⁰ = 556423303323631 is a prime.

It is a super-4 number, since 4×556423303324655⁴ (a number of 60 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 556423303324655.

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, 556307846 + ... + 557307155.

It is an arithmetic number, because the mean of its divisors is an integer number (44947728710724).

Almost surely, 2^{556423303324655} is an apocalyptic number.

556423303324655 is a deficient number, since it is larger than the sum of its proper divisors (162740356046929).

556423303324655 is a wasteful number, since it uses less digits than its factorization.

556423303324655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113622706.

The product of its (nonzero) digits is 116640000, while the sum is 56.

It can be divided in two parts, 55642330 and 3324655, that added together give a palindrome (58966985).

The spelling of 556423303324655 in words is "five hundred fifty-six trillion, four hundred twenty-three billion, three hundred three million, three hundred twenty-four thousand, six hundred fifty-five".