55669377575520 has 72 divisors (see below), whose sum is σ = 189971750981376. Its totient is φ = 14845167353088.

The previous prime is 55669377575519. The next prime is 55669377575531. The reversal of 55669377575520 is 2557577396655.

55669377575520 is a `hidden beast` number, since 5 + 5 + 6 + 6 + 93 + 7 + 7 + 5 + 7 + 5 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19329643552 + ... + 19329646431.

It is an arithmetic number, because the mean of its divisors is an integer number (2638496541408).

Almost surely, 2^{55669377575520} is an apocalyptic number.

It is an amenable number.

55669377575520 is an abundant number, since it is smaller than the sum of its proper divisors (134302373405856).

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

55669377575520 is a wasteful number, since it uses less digits than its factorization.

55669377575520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38659290004 (or 38659289993 counting only the distinct ones).

The product of its (nonzero) digits is 2083725000, while the sum is 72.

The spelling of 55669377575520 in words is "fifty-five trillion, six hundred sixty-nine billion, three hundred seventy-seven million, five hundred seventy-five thousand, five hundred twenty".