161873301719 has 2 divisors, whose sum is σ = 161873301720. Its totient is φ = 161873301718.

The previous prime is 161873301713. The next prime is 161873301731. The reversal of 161873301719 is 917103378161.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (917103378161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161873301719 - 2¹² = 161873297623 is a prime.

It is a super-2 number, since 2×161873301719² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161873301713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80936650859 + 80936650860.

It is an arithmetic number, because the mean of its divisors is an integer number (80936650860).

Almost surely, 2^161873301719 is an apocalyptic number.

161873301719 is a deficient number, since it is larger than the sum of its proper divisors (1).

161873301719 is an equidigital number, since it uses as much as digits as its factorization.

161873301719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 47.

The spelling of 161873301719 in words is "one hundred sixty-one billion, eight hundred seventy-three million, three hundred one thousand, seven hundred nineteen".