50557211721 has 8 divisors (see below), whose sum is σ = 74899572960. Its totient is φ = 33704807796.

The previous prime is 50557211717. The next prime is 50557211737. The reversal of 50557211721 is 12711275505.

50557211721 is a `hidden beast` number, since 5 + 0 + 5 + 572 + 11 + 72 + 1 = 666.

50557211721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 50557211721 - 2² = 50557211717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50557211711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 936244635 + ... + 936244688.

It is an arithmetic number, because the mean of its divisors is an integer number (9362446620).

Almost surely, 2^50557211721 is an apocalyptic number.

It is an amenable number.

50557211721 is a deficient number, since it is larger than the sum of its proper divisors (24342361239).

50557211721 is a wasteful number, since it uses less digits than its factorization.

50557211721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872489332 (or 1872489326 counting only the distinct ones).

The product of its (nonzero) digits is 24500, while the sum is 36.

The spelling of 50557211721 in words is "fifty billion, five hundred fifty-seven million, two hundred eleven thousand, seven hundred twenty-one".