161316311279 has 2 divisors, whose sum is σ = 161316311280. Its totient is φ = 161316311278.

The previous prime is 161316311207. The next prime is 161316311327. The reversal of 161316311279 is 972113613161.

It is a strong prime.

It is an emirp because it is prime and its reverse (972113613161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161316311279 - 2²⁴ = 161299534063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161316311879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80658155639 + 80658155640.

It is an arithmetic number, because the mean of its divisors is an integer number (80658155640).

Almost surely, 2^161316311279 is an apocalyptic number.

161316311279 is a deficient number, since it is larger than the sum of its proper divisors (1).

161316311279 is an equidigital number, since it uses as much as digits as its factorization.

161316311279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 41.

The spelling of 161316311279 in words is "one hundred sixty-one billion, three hundred sixteen million, three hundred eleven thousand, two hundred seventy-nine".