55799438156 has 144 divisors (see below), whose sum is σ = 128263855104. Its totient is φ = 20981520000.

The previous prime is 55799438143. The next prime is 55799438263. The reversal of 55799438156 is 65183499755.

It is a super-2 number, since 2×55799438156² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30810491 + ... + 30812301.

It is an arithmetic number, because the mean of its divisors is an integer number (890721216).

Almost surely, 2^55799438156 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 55799438156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64131927552).

55799438156 is an abundant number, since it is smaller than the sum of its proper divisors (72464416948).

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

55799438156 is a wasteful number, since it uses less digits than its factorization.

55799438156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332 (or 2323 counting only the distinct ones).

The product of its digits is 40824000, while the sum is 62.

The spelling of 55799438156 in words is "fifty-five billion, seven hundred ninety-nine million, four hundred thirty-eight thousand, one hundred fifty-six".