83161605181 has 2 divisors, whose sum is σ = 83161605182. Its totient is φ = 83161605180.

The previous prime is 83161605161. The next prime is 83161605199. The reversal of 83161605181 is 18150616138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49428405625 + 33733199556 = 222325^2 + 183666^2 .

It is a cyclic number.

It is not a de Polignac number, because 83161605181 - 2²⁵ = 83128050749 is a prime.

It is a super-2 number, since 2×83161605181² (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 (83161605101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41580802590 + 41580802591.

It is an arithmetic number, because the mean of its divisors is an integer number (41580802591).

Almost surely, 2^83161605181 is an apocalyptic number.

It is an amenable number.

83161605181 is a deficient number, since it is larger than the sum of its proper divisors (1).

83161605181 is an equidigital number, since it uses as much as digits as its factorization.

83161605181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 40.

The spelling of 83161605181 in words is "eighty-three billion, one hundred sixty-one million, six hundred five thousand, one hundred eighty-one".