55170570520 has 96 divisors (see below), whose sum is σ = 136259604000. Its totient is φ = 20091442176.

The previous prime is 55170570487. The next prime is 55170570523. The reversal of 55170570520 is 2507507155.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55170570520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55170570523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 437581 + ... + 549379.

It is an arithmetic number, because the mean of its divisors is an integer number (1419370875).

Almost surely, 2^55170570520 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 55170570520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68129802000).

55170570520 is an abundant number, since it is smaller than the sum of its proper divisors (81089033480).

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

55170570520 is a wasteful number, since it uses less digits than its factorization.

55170570520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111909 (or 111892 counting only the distinct ones).

The product of its (nonzero) digits is 61250, while the sum is 37.

The spelling of 55170570520 in words is "fifty-five billion, one hundred seventy million, five hundred seventy thousand, five hundred twenty".