56211722072166 has 16 divisors (see below), whose sum is σ = 119036587917744. Its totient is φ = 17635050061824.

The previous prime is 56211722072153. The next prime is 56211722072173. The reversal of 56211722072166 is 66127022711265.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275547657115 + ... + 275547657318.

It is an arithmetic number, because the mean of its divisors is an integer number (7439786744859).

Almost surely, 2^{56211722072166} is an apocalyptic number.

56211722072166 is an abundant number, since it is smaller than the sum of its proper divisors (62824865845578).

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

56211722072166 is a wasteful number, since it uses less digits than its factorization.

56211722072166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551095314455.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 56211722072166 in words is "fifty-six trillion, two hundred eleven billion, seven hundred twenty-two million, seventy-two thousand, one hundred sixty-six".