55640612104 has 128 divisors (see below), whose sum is σ = 138495744000. Its totient is φ = 20735373120.

The previous prime is 55640612087. The next prime is 55640612119. The reversal of 55640612104 is 40121604655.

It is a self number, because there is not a number n which added to its sum of digits gives 55640612104.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 654159 + ... + 734305.

It is an arithmetic number, because the mean of its divisors is an integer number (1081998000).

Almost surely, 2^55640612104 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 55640612104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69247872000).

55640612104 is an abundant number, since it is smaller than the sum of its proper divisors (82855131896).

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

55640612104 is a wasteful number, since it uses less digits than its factorization.

55640612104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80208 (or 80190 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 55640612104 in words is "fifty-five billion, six hundred forty million, six hundred twelve thousand, one hundred four".