161316311327 has 2 divisors, whose sum is σ = 161316311328. Its totient is φ = 161316311326.

The previous prime is 161316311279. The next prime is 161316311329. The reversal of 161316311327 is 723113613161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161316311327 - 2²² = 161312117023 is a prime.

Together with 161316311329, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161316311329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80658155663 + 80658155664.

It is an arithmetic number, because the mean of its divisors is an integer number (80658155664).

Almost surely, 2^161316311327 is an apocalyptic number.

161316311327 is a deficient number, since it is larger than the sum of its proper divisors (1).

161316311327 is an equidigital number, since it uses as much as digits as its factorization.

161316311327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 35.

Adding to 161316311327 its reverse (723113613161), we get a palindrome (884429924488).

The spelling of 161316311327 in words is "one hundred sixty-one billion, three hundred sixteen million, three hundred eleven thousand, three hundred twenty-seven".