161616159 has 24 divisors (see below), whose sum is σ = 242402160. Its totient is φ = 103638528.

The previous prime is 161616151. The next prime is 161616179. The reversal of 161616159 is 951616161.

It is not a de Polignac number, because 161616159 - 2³ = 161616151 is a prime.

It is a super-2 number, since 2×161616159² = 52239565699826562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161616151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79119 + ... + 81135.

It is an arithmetic number, because the mean of its divisors is an integer number (10100090).

Almost surely, 2^161616159 is an apocalyptic number.

161616159 is a deficient number, since it is larger than the sum of its proper divisors (80786001).

161616159 is a wasteful number, since it uses less digits than its factorization.

161616159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2359 (or 2356 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 161616159 is about 12712.8344203801. The cubic root of 161616159 is about 544.7052908230.

The spelling of 161616159 in words is "one hundred sixty-one million, six hundred sixteen thousand, one hundred fifty-nine".