161105092 has 12 divisors (see below), whose sum is σ = 291655980. Its totient is φ = 77774816.

The previous prime is 161105083. The next prime is 161105093. The reversal of 161105092 is 290501161.

It can be written as a sum of positive squares in 2 ways, for example, as 112021056 + 49084036 = 10584^2 + 7006^2 .

It is not an unprimeable number, because it can be changed into a prime (161105093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694303 + ... + 694534.

It is an arithmetic number, because the mean of its divisors is an integer number (24304665).

Almost surely, 2^161105092 is an apocalyptic number.

It is an amenable number.

161105092 is a deficient number, since it is larger than the sum of its proper divisors (130550888).

161105092 is a wasteful number, since it uses less digits than its factorization.

161105092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388870 (or 1388868 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 161105092 is about 12692.7180698226. The cubic root of 161105092 is about 544.1305239356.

The spelling of 161105092 in words is "one hundred sixty-one million, one hundred five thousand, ninety-two".