5116315808521 has 2 divisors, whose sum is σ = 5116315808522. Its totient is φ = 5116315808520.

The previous prime is 5116315808489. The next prime is 5116315808533. The reversal of 5116315808521 is 1258085136115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5002652428921 + 113663379600 = 2236661^2 + 337140^2 .

It is a cyclic number.

It is not a de Polignac number, because 5116315808521 - 2⁵ = 5116315808489 is a prime.

It is not a weakly prime, because it can be changed into another prime (5116315808621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2558157904260 + 2558157904261.

It is an arithmetic number, because the mean of its divisors is an integer number (2558157904261).

Almost surely, 2^{5116315808521} is an apocalyptic number.

It is an amenable number.

5116315808521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5116315808521 is an equidigital number, since it uses as much as digits as its factorization.

5116315808521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288000, while the sum is 46.

The spelling of 5116315808521 in words is "five trillion, one hundred sixteen billion, three hundred fifteen million, eight hundred eight thousand, five hundred twenty-one".