55817705025840 has 320 divisors, whose sum is σ = 178754808960000. Its totient is φ = 14397464309760.

The previous prime is 55817705025751. The next prime is 55817705025917. The reversal of 55817705025840 is 4852050771855.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8034789247 + ... + 8034796193.

It is an arithmetic number, because the mean of its divisors is an integer number (558608778000).

Almost surely, 2^{55817705025840} 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 55817705025840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89377404480000).

55817705025840 is an abundant number, since it is smaller than the sum of its proper divisors (122937103934160).

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

55817705025840 is a wasteful number, since it uses less digits than its factorization.

55817705025840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12180 (or 12174 counting only the distinct ones).

The product of its (nonzero) digits is 15680000, while the sum is 57.

The spelling of 55817705025840 in words is "fifty-five trillion, eight hundred seventeen billion, seven hundred five million, twenty-five thousand, eight hundred forty".