8538715999117 has 2 divisors, whose sum is σ = 8538715999118. Its totient is φ = 8538715999116.

The previous prime is 8538715999061. The next prime is 8538715999139. The reversal of 8538715999117 is 7119995178358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4671157173796 + 3867558825321 = 2161286^2 + 1966611^2 .

It is a cyclic number.

It is not a de Polignac number, because 8538715999117 - 2³⁵ = 8504356260749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8538715999117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8538715999147) 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, 4269357999558 + 4269357999559.

It is an arithmetic number, because the mean of its divisors is an integer number (4269357999559).

Almost surely, 2^{8538715999117} is an apocalyptic number.

It is an amenable number.

8538715999117 is a deficient number, since it is larger than the sum of its proper divisors (1).

8538715999117 is an equidigital number, since it uses as much as digits as its factorization.

8538715999117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 171460800, while the sum is 73.

The spelling of 8538715999117 in words is "eight trillion, five hundred thirty-eight billion, seven hundred fifteen million, nine hundred ninety-nine thousand, one hundred seventeen".