161316317311 has 2 divisors, whose sum is σ = 161316317312. Its totient is φ = 161316317310.

The previous prime is 161316317273. The next prime is 161316317317. The reversal of 161316317311 is 113713613161.

It is a strong prime.

It is an emirp because it is prime and its reverse (113713613161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161316317311 - 2²³ = 161307928703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161316317317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80658158655 + 80658158656.

It is an arithmetic number, because the mean of its divisors is an integer number (80658158656).

Almost surely, 2^161316317311 is an apocalyptic number.

161316317311 is a deficient number, since it is larger than the sum of its proper divisors (1).

161316317311 is an equidigital number, since it uses as much as digits as its factorization.

161316317311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 34.

The spelling of 161316317311 in words is "one hundred sixty-one billion, three hundred sixteen million, three hundred seventeen thousand, three hundred eleven".