161841716612911 has 2 divisors, whose sum is σ = 161841716612912. Its totient is φ = 161841716612910.

The previous prime is 161841716612903. The next prime is 161841716612941. The reversal of 161841716612911 is 119216617148161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161841716612911 - 2³ = 161841716612903 is a prime.

It is a super-3 number, since 3×161841716612911³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161841716612941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80920858306455 + 80920858306456.

It is an arithmetic number, because the mean of its divisors is an integer number (80920858306456).

Almost surely, 2^{161841716612911} is an apocalyptic number.

161841716612911 is a deficient number, since it is larger than the sum of its proper divisors (1).

161841716612911 is an equidigital number, since it uses as much as digits as its factorization.

161841716612911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 55.

The spelling of 161841716612911 in words is "one hundred sixty-one trillion, eight hundred forty-one billion, seven hundred sixteen million, six hundred twelve thousand, nine hundred eleven".