56662172215 has 48 divisors (see below), whose sum is σ = 78513624000. Its totient is φ = 39151185920.

The previous prime is 56662172137. The next prime is 56662172233. The reversal of 56662172215 is 51227126665.

It is not a de Polignac number, because 56662172215 - 2⁹ = 56662171703 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2059671 + ... + 2086999.

It is an arithmetic number, because the mean of its divisors is an integer number (1635700500).

Almost surely, 2^56662172215 is an apocalyptic number.

56662172215 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

56662172215 is a deficient number, since it is larger than the sum of its proper divisors (21851451785).

56662172215 is a wasteful number, since it uses less digits than its factorization.

56662172215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27528 (or 27517 counting only the distinct ones).

The product of its digits is 302400, while the sum is 43.

It can be divided in two parts, 566621 and 72215, that added together give a palindrome (638836).

The spelling of 56662172215 in words is "fifty-six billion, six hundred sixty-two million, one hundred seventy-two thousand, two hundred fifteen".