55777555560 has 64 divisors (see below), whose sum is σ = 177175771200. Its totient is φ = 13999072256.

The previous prime is 55777555549. The next prime is 55777555579. The reversal of 55777555560 is 6555577755.

It is a super-2 number, since 2×55777555560² (a number of 22 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 55777555560.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13668930 + ... + 13673009.

It is an arithmetic number, because the mean of its divisors is an integer number (2768371425).

Almost surely, 2^55777555560 is an apocalyptic number.

It is an amenable number.

55777555560 is an abundant number, since it is smaller than the sum of its proper divisors (121398215640).

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

55777555560 is a wasteful number, since it uses less digits than its factorization.

55777555560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27341970 (or 27341966 counting only the distinct ones).

The product of its (nonzero) digits is 32156250, while the sum is 57.

The spelling of 55777555560 in words is "fifty-five billion, seven hundred seventy-seven million, five hundred fifty-five thousand, five hundred sixty".