55357350177920 has 128 divisors (see below), whose sum is σ = 153066409050240. Its totient is φ = 18750992154624.

The previous prime is 55357350177847. The next prime is 55357350177977. The reversal of 55357350177920 is 2977105375355.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 55357350177920.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74065217 + ... + 74808896.

It is an arithmetic number, because the mean of its divisors is an integer number (1195831320705).

Almost surely, 2^{55357350177920} is an apocalyptic number.

It is an amenable number.

55357350177920 is an abundant number, since it is smaller than the sum of its proper divisors (97709058872320).

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

55357350177920 is a wasteful number, since it uses less digits than its factorization.

55357350177920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148874222 (or 148874210 counting only the distinct ones).

The product of its (nonzero) digits is 34728750, while the sum is 59.

The spelling of 55357350177920 in words is "fifty-five trillion, three hundred fifty-seven billion, three hundred fifty million, one hundred seventy-seven thousand, nine hundred twenty".