8156872959017 has 2 divisors, whose sum is σ = 8156872959018. Its totient is φ = 8156872959016.

The previous prime is 8156872958959. The next prime is 8156872959019. The reversal of 8156872959017 is 7109592786518.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7442753315881 + 714119643136 = 2728141^2 + 845056^2 .

It is a cyclic number.

It is not a de Polignac number, because 8156872959017 - 2²⁰ = 8156871910441 is a prime.

Together with 8156872959019, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8156872959019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4078436479508 + 4078436479509.

It is an arithmetic number, because the mean of its divisors is an integer number (4078436479509).

Almost surely, 2^{8156872959017} is an apocalyptic number.

It is an amenable number.

8156872959017 is a deficient number, since it is larger than the sum of its proper divisors (1).

8156872959017 is an equidigital number, since it uses as much as digits as its factorization.

8156872959017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76204800, while the sum is 68.

The spelling of 8156872959017 in words is "eight trillion, one hundred fifty-six billion, eight hundred seventy-two million, nine hundred fifty-nine thousand, seventeen".