50657721121 has 16 divisors (see below), whose sum is σ = 58422858624. Its totient is φ = 43024875264.

The previous prime is 50657721119. The next prime is 50657721139. The reversal of 50657721121 is 12112775605.

It is not a de Polignac number, because 50657721121 - 2¹ = 50657721119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50657724121) 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, 4104666 + ... + 4116988.

It is an arithmetic number, because the mean of its divisors is an integer number (3651428664).

Almost surely, 2^50657721121 is an apocalyptic number.

It is an amenable number.

50657721121 is a deficient number, since it is larger than the sum of its proper divisors (7765137503).

50657721121 is a wasteful number, since it uses less digits than its factorization.

50657721121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17640.

The product of its (nonzero) digits is 29400, while the sum is 37.

The spelling of 50657721121 in words is "fifty billion, six hundred fifty-seven million, seven hundred twenty-one thousand, one hundred twenty-one".