161105615 has 16 divisors (see below), whose sum is σ = 211986720. Its totient is φ = 116565120.

The previous prime is 161105591. The next prime is 161105627. The reversal of 161105615 is 516501161.

It is not a de Polignac number, because 161105615 - 2²² = 156911311 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3401 + ... + 18269.

It is an arithmetic number, because the mean of its divisors is an integer number (13249170).

Almost surely, 2^161105615 is an apocalyptic number.

161105615 is a deficient number, since it is larger than the sum of its proper divisors (50881105).

161105615 is a wasteful number, since it uses less digits than its factorization.

161105615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15082.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 161105615 is about 12692.7386721700. The cubic root of 161105615 is about 544.1311127437.

Adding to 161105615 its reverse (516501161), we get a palindrome (677606776).

The spelling of 161105615 in words is "one hundred sixty-one million, one hundred five thousand, six hundred fifteen".