55585456057818 has 32 divisors (see below), whose sum is σ = 123535405480320. Its totient is φ = 18526659883200.

The previous prime is 55585456057787. The next prime is 55585456057819. The reversal of 55585456057818 is 81875065458555.

55585456057818 is a `hidden beast` number, since 5 + 5 + 5 + 8 + 5 + 4 + 5 + 605 + 7 + 8 + 1 + 8 = 666.

It is a super-2 number, since 2×55585456057818² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55585456057819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50154255 + ... + 51250562.

It is an arithmetic number, because the mean of its divisors is an integer number (3860481421260).

Almost surely, 2^{55585456057818} is an apocalyptic number.

55585456057818 is an abundant number, since it is smaller than the sum of its proper divisors (67949949422502).

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

55585456057818 is a wasteful number, since it uses less digits than its factorization.

55585456057818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101414979 (or 101414973 counting only the distinct ones).

The product of its (nonzero) digits is 1344000000, while the sum is 72.

The spelling of 55585456057818 in words is "fifty-five trillion, five hundred eighty-five billion, four hundred fifty-six million, fifty-seven thousand, eight hundred eighteen".