161371950419 has 2 divisors, whose sum is σ = 161371950420. Its totient is φ = 161371950418.

The previous prime is 161371950413. The next prime is 161371950427. The reversal of 161371950419 is 914059173161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161371950419 - 2²⁰ = 161370901843 is a prime.

It is a super-2 number, since 2×161371950419² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161371950413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80685975209 + 80685975210.

It is an arithmetic number, because the mean of its divisors is an integer number (80685975210).

Almost surely, 2^161371950419 is an apocalyptic number.

161371950419 is a deficient number, since it is larger than the sum of its proper divisors (1).

161371950419 is an equidigital number, since it uses as much as digits as its factorization.

161371950419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 47.

The spelling of 161371950419 in words is "one hundred sixty-one billion, three hundred seventy-one million, nine hundred fifty thousand, four hundred nineteen".