50437608721 has 2 divisors, whose sum is σ = 50437608722. Its totient is φ = 50437608720.

The previous prime is 50437608719. The next prime is 50437608757. The reversal of 50437608721 is 12780673405.

50437608721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44312355025 + 6125253696 = 210505^2 + 78264^2 .

It is a cyclic number.

It is not a de Polignac number, because 50437608721 - 2¹ = 50437608719 is a prime.

Together with 50437608719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (50437608701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25218804360 + 25218804361.

It is an arithmetic number, because the mean of its divisors is an integer number (25218804361).

Almost surely, 2^50437608721 is an apocalyptic number.

It is an amenable number.

50437608721 is a deficient number, since it is larger than the sum of its proper divisors (1).

50437608721 is an equidigital number, since it uses as much as digits as its factorization.

50437608721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 50437608721 in words is "fifty billion, four hundred thirty-seven million, six hundred eight thousand, seven hundred twenty-one".