161873314349 has 2 divisors, whose sum is σ = 161873314350. Its totient is φ = 161873314348.

The previous prime is 161873314333. The next prime is 161873314397. The reversal of 161873314349 is 943413378161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151406592100 + 10466722249 = 389110^2 + 102307^2 .

It is a cyclic number.

It is not a de Polignac number, because 161873314349 - 2⁴ = 161873314333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161873314297 and 161873314306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161873314049) 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, 80936657174 + 80936657175.

It is an arithmetic number, because the mean of its divisors is an integer number (80936657175).

Almost surely, 2^161873314349 is an apocalyptic number.

It is an amenable number.

161873314349 is a deficient number, since it is larger than the sum of its proper divisors (1).

161873314349 is an equidigital number, since it uses as much as digits as its factorization.

161873314349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 50.

The spelling of 161873314349 in words is "one hundred sixty-one billion, eight hundred seventy-three million, three hundred fourteen thousand, three hundred forty-nine".