50657721120 has 72 divisors (see below), whose sum is σ = 172869478236. Its totient is φ = 13508725248.

The previous prime is 50657721119. The next prime is 50657721139. The reversal of 50657721120 is 2112775605.

50657721120 is a `hidden beast` number, since 50 + 6 + 577 + 2 + 11 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 44519312016 + 6138409104 = 210996^2 + 78348^2 .

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 (36).

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, 17588047 + ... + 17590926.

Almost surely, 2^50657721120 is an apocalyptic number.

It is an amenable number.

50657721120 is an abundant number, since it is smaller than the sum of its proper divisors (122211757116).

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

50657721120 is a wasteful number, since it uses less digits than its factorization.

50657721120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35178994 (or 35178983 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The spelling of 50657721120 in words is "fifty billion, six hundred fifty-seven million, seven hundred twenty-one thousand, one hundred twenty".