50505513137 has 2 divisors, whose sum is σ = 50505513138. Its totient is φ = 50505513136.

The previous prime is 50505513073. The next prime is 50505513139. The reversal of 50505513137 is 73131550505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49572577201 + 932935936 = 222649^2 + 30544^2 .

It is a cyclic number.

It is not a de Polignac number, because 50505513137 - 2⁶ = 50505513073 is a prime.

Together with 50505513139, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 50505513097 and 50505513106.

It is not a weakly prime, because it can be changed into another prime (50505513139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25252756568 + 25252756569.

It is an arithmetic number, because the mean of its divisors is an integer number (25252756569).

Almost surely, 2^50505513137 is an apocalyptic number.

It is an amenable number.

50505513137 is a deficient number, since it is larger than the sum of its proper divisors (1).

50505513137 is an equidigital number, since it uses as much as digits as its factorization.

50505513137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39375, while the sum is 35.

The spelling of 50505513137 in words is "fifty billion, five hundred five million, five hundred thirteen thousand, one hundred thirty-seven".