55120564321524 has 72 divisors (see below), whose sum is σ = 150827888687112. Its totient is φ = 16872297062400.

The previous prime is 55120564321507. The next prime is 55120564321561. The reversal of 55120564321524 is 42512346502155.

55120564321524 is a `hidden beast` number, since 5 + 5 + 1 + 2 + 0 + 564 + 32 + 1 + 52 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 65915427600 + 55054648893924 = 256740^2 + 7419882^2 .

It is a super-2 number, since 2×55120564321524² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55120564321524.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 305036577 + ... + 305217224.

It is an arithmetic number, because the mean of its divisors is an integer number (2094831787321).

Almost surely, 2^{55120564321524} is an apocalyptic number.

It is an amenable number.

55120564321524 is an abundant number, since it is smaller than the sum of its proper divisors (95707324365588).

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

55120564321524 is a wasteful number, since it uses less digits than its factorization.

55120564321524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610254017 (or 610254012 counting only the distinct ones).

The product of its (nonzero) digits is 1440000, while the sum is 45.

The spelling of 55120564321524 in words is "fifty-five trillion, one hundred twenty billion, five hundred sixty-four million, three hundred twenty-one thousand, five hundred twenty-four".