50640313661 has 12 divisors (see below), whose sum is σ = 58921591068. Its totient is φ = 43396057152.

The previous prime is 50640313583. The next prime is 50640313681. The reversal of 50640313661 is 16631304605.

It can be written as a sum of positive squares in 2 ways, for example, as 31687560100 + 18952753561 = 178010^2 + 137669^2 .

It is not a de Polignac number, because 50640313661 - 2¹⁴ = 50640297277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50640313681) 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, 102455 + ... + 334331.

It is an arithmetic number, because the mean of its divisors is an integer number (4910132589).

Almost surely, 2^50640313661 is an apocalyptic number.

It is an amenable number.

50640313661 is a deficient number, since it is larger than the sum of its proper divisors (8281277407).

50640313661 is a wasteful number, since it uses less digits than its factorization.

50640313661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236348 (or 236341 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 50640313661 in words is "fifty billion, six hundred forty million, three hundred thirteen thousand, six hundred sixty-one".