50971717971 has 12 divisors (see below), whose sum is σ = 73858077072. Its totient is φ = 33873947376.

The previous prime is 50971717969. The next prime is 50971717999. The reversal of 50971717971 is 17971717905.

It is a happy number.

It is not a de Polignac number, because 50971717971 - 2¹ = 50971717969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50971718971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8930151 + ... + 8935856.

It is an arithmetic number, because the mean of its divisors is an integer number (6154839756).

Almost surely, 2^50971717971 is an apocalyptic number.

50971717971 is a deficient number, since it is larger than the sum of its proper divisors (22886359101).

50971717971 is a wasteful number, since it uses less digits than its factorization.

50971717971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17866330 (or 17866327 counting only the distinct ones).

The product of its (nonzero) digits is 972405, while the sum is 54.

The spelling of 50971717971 in words is "fifty billion, nine hundred seventy-one million, seven hundred seventeen thousand, nine hundred seventy-one".