161091110 has 16 divisors (see below), whose sum is σ = 290110896. Its totient is φ = 64403808.

The previous prime is 161091109. The next prime is 161091163. The reversal of 161091110 is 11190161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31064 + ... + 35876.

It is an arithmetic number, because the mean of its divisors is an integer number (18131931).

Almost surely, 2^161091110 is an apocalyptic number.

161091110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161091110 is a deficient number, since it is larger than the sum of its proper divisors (129019786).

161091110 is a wasteful number, since it uses less digits than its factorization.

161091110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8167.

The product of its (nonzero) digits is 54, while the sum is 20.

The square root of 161091110 is about 12692.1672696195. The cubic root of 161091110 is about 544.1147821342.

The spelling of 161091110 in words is "one hundred sixty-one million, ninety-one thousand, one hundred ten".