161311413377 has 2 divisors, whose sum is σ = 161311413378. Its totient is φ = 161311413376.

The previous prime is 161311413359. The next prime is 161311413383. The reversal of 161311413377 is 773314113161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153186914881 + 8124498496 = 391391^2 + 90136^2 .

It is a cyclic number.

It is not a de Polignac number, because 161311413377 - 2⁸ = 161311413121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161311413377.

It is not a weakly prime, because it can be changed into another prime (161311413337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80655706688 + 80655706689.

It is an arithmetic number, because the mean of its divisors is an integer number (80655706689).

Almost surely, 2^161311413377 is an apocalyptic number.

It is an amenable number.

161311413377 is a deficient number, since it is larger than the sum of its proper divisors (1).

161311413377 is an equidigital number, since it uses as much as digits as its factorization.

161311413377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 38.

The spelling of 161311413377 in words is "one hundred sixty-one billion, three hundred eleven million, four hundred thirteen thousand, three hundred seventy-seven".