50531538613 has 2 divisors, whose sum is σ = 50531538614. Its totient is φ = 50531538612.

The previous prime is 50531538587. The next prime is 50531538703. The reversal of 50531538613 is 31683513505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48999364164 + 1532174449 = 221358^2 + 39143^2 .

It is a cyclic number.

It is not a de Polignac number, because 50531538613 - 2²⁵ = 50497984181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50531532613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25265769306 + 25265769307.

It is an arithmetic number, because the mean of its divisors is an integer number (25265769307).

Almost surely, 2^50531538613 is an apocalyptic number.

It is an amenable number.

50531538613 is a deficient number, since it is larger than the sum of its proper divisors (1).

50531538613 is an equidigital number, since it uses as much as digits as its factorization.

50531538613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 50531538613 in words is "fifty billion, five hundred thirty-one million, five hundred thirty-eight thousand, six hundred thirteen".