50684646721 has 2 divisors, whose sum is σ = 50684646722. Its totient is φ = 50684646720.

The previous prime is 50684646703. The next prime is 50684646737. The reversal of 50684646721 is 12764648605.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47740065025 + 2944581696 = 218495^2 + 54264^2 .

It is a cyclic number.

It is not a de Polignac number, because 50684646721 - 2²⁷ = 50550428993 is a prime.

It is not a weakly prime, because it can be changed into another prime (50684346721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25342323360 + 25342323361.

It is an arithmetic number, because the mean of its divisors is an integer number (25342323361).

Almost surely, 2^50684646721 is an apocalyptic number.

It is an amenable number.

50684646721 is a deficient number, since it is larger than the sum of its proper divisors (1).

50684646721 is an equidigital number, since it uses as much as digits as its factorization.

50684646721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 50684646721 in words is "fifty billion, six hundred eighty-four million, six hundred forty-six thousand, seven hundred twenty-one".