55156611520 has 56 divisors (see below), whose sum is σ = 139067676144. Its totient is φ = 20764839936.

The previous prime is 55156611511. The next prime is 55156611527. The reversal of 55156611520 is 2511665155.

55156611520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 55156611520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55156611527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5064102 + ... + 5074981.

Almost surely, 2^55156611520 is an apocalyptic number.

It is an amenable number.

55156611520 is an abundant number, since it is smaller than the sum of its proper divisors (83911064624).

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

55156611520 is a wasteful number, since it uses less digits than its factorization.

55156611520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10139117 (or 10139107 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 37.

The spelling of 55156611520 in words is "fifty-five billion, one hundred fifty-six million, six hundred eleven thousand, five hundred twenty".