55805815836 has 24 divisors (see below), whose sum is σ = 144681745040. Its totient is φ = 18601938576.

The previous prime is 55805815783. The next prime is 55805815843. The reversal of 55805815836 is 63851850855.

It is a happy number.

55805815836 is a `hidden beast` number, since 5 + 5 + 8 + 0 + 58 + 1 + 583 + 6 = 666.

55805815836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55805815836² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258360151 + ... + 258360366.

Almost surely, 2^55805815836 is an apocalyptic number.

It is an amenable number.

55805815836 is an abundant number, since it is smaller than the sum of its proper divisors (88875929204).

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

55805815836 is a wasteful number, since it uses less digits than its factorization.

55805815836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516720530 (or 516720522 counting only the distinct ones).

The product of its (nonzero) digits is 5760000, while the sum is 54.

The spelling of 55805815836 in words is "fifty-five billion, eight hundred five million, eight hundred fifteen thousand, eight hundred thirty-six".