55757807580 has 96 divisors (see below), whose sum is σ = 163320494400. Its totient is φ = 14194690048.

The previous prime is 55757807579. The next prime is 55757807587. The reversal of 55757807580 is 8570875755.

It is a super-2 number, since 2×55757807580² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 55757807580.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55757807587) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25167 + ... + 334886.

It is an arithmetic number, because the mean of its divisors is an integer number (1701255150).

Almost surely, 2^55757807580 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 55757807580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81660247200).

55757807580 is an abundant number, since it is smaller than the sum of its proper divisors (107562686820).

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

55757807580 is a wasteful number, since it uses less digits than its factorization.

55757807580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360183 (or 360181 counting only the distinct ones).

The product of its (nonzero) digits is 13720000, while the sum is 57.

The spelling of 55757807580 in words is "fifty-five billion, seven hundred fifty-seven million, eight hundred seven thousand, five hundred eighty".