55562221968 has 160 divisors (see below), whose sum is σ = 166032944640. Its totient is φ = 15834055680.

The previous prime is 55562221961. The next prime is 55562221991. The reversal of 55562221968 is 86912226555.

55562221968 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 55562221968.

It is not an unprimeable number, because it can be changed into a prime (55562221961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1354171 + ... + 1394597.

It is an arithmetic number, because the mean of its divisors is an integer number (1037705904).

Almost surely, 2^55562221968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55562221968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83016472320).

55562221968 is an abundant number, since it is smaller than the sum of its proper divisors (110470722672).

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

55562221968 is a wasteful number, since it uses less digits than its factorization.

55562221968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40605 (or 40599 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 51.

The spelling of 55562221968 in words is "fifty-five billion, five hundred sixty-two million, two hundred twenty-one thousand, nine hundred sixty-eight".