55521166722 has 64 divisors (see below), whose sum is σ = 128357961984. Its totient is φ = 15682118400.

The previous prime is 55521166703. The next prime is 55521166751. The reversal of 55521166722 is 22766112555.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2862168 + ... + 2881500.

It is an arithmetic number, because the mean of its divisors is an integer number (2005593156).

Almost surely, 2^55521166722 is an apocalyptic number.

55521166722 is an abundant number, since it is smaller than the sum of its proper divisors (72836795262).

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

55521166722 is a wasteful number, since it uses less digits than its factorization.

55521166722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20123.

The product of its digits is 252000, while the sum is 42.

The spelling of 55521166722 in words is "fifty-five billion, five hundred twenty-one million, one hundred sixty-six thousand, seven hundred twenty-two".