55817705025820 has 24 divisors (see below), whose sum is σ = 117268300223424. Its totient is φ = 22317344930496.

The previous prime is 55817705025751. The next prime is 55817705025917. The reversal of 55817705025820 is 2852050771855.

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, 608520484 + ... + 608612203.

It is an arithmetic number, because the mean of its divisors is an integer number (4886179175976).

Almost surely, 2^{55817705025820} is an apocalyptic number.

It is an amenable number.

55817705025820 is an abundant number, since it is smaller than the sum of its proper divisors (61450595197604).

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

55817705025820 is a wasteful number, since it uses less digits than its factorization.

55817705025820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217134989 (or 1217134987 counting only the distinct ones).

The product of its (nonzero) digits is 7840000, while the sum is 55.

The spelling of 55817705025820 in words is "fifty-five trillion, eight hundred seventeen billion, seven hundred five million, twenty-five thousand, eight hundred twenty".