55638803412 has 72 divisors (see below), whose sum is σ = 146469141000. Its totient is φ = 17786512128.

The previous prime is 55638803351. The next prime is 55638803477. The reversal of 55638803412 is 21430883655.

55638803412 is a `hidden beast` number, since 5 + 5 + 638 + 8 + 0 + 3 + 4 + 1 + 2 = 666.

55638803412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 39992976 + 55598810436 = 6324^2 + 235794^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23283 + ... + 334394.

It is an arithmetic number, because the mean of its divisors is an integer number (2034293625).

Almost surely, 2^55638803412 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 55638803412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73234570500).

55638803412 is an abundant number, since it is smaller than the sum of its proper divisors (90830337588).

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

55638803412 is a wasteful number, since it uses less digits than its factorization.

55638803412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357865 (or 357860 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 55638803412 in words is "fifty-five billion, six hundred thirty-eight million, eight hundred three thousand, four hundred twelve".