161161105 has 16 divisors (see below), whose sum is σ = 234023040. Its totient is φ = 104009472.

The previous prime is 161161103. The next prime is 161161123. The reversal of 161161105 is 501161161.

It is not a de Polignac number, because 161161105 - 2¹ = 161161103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161161103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134835 + ... + 136024.

It is an arithmetic number, because the mean of its divisors is an integer number (14626440).

Almost surely, 2^161161105 is an apocalyptic number.

It is an amenable number.

161161105 is a deficient number, since it is larger than the sum of its proper divisors (72861935).

161161105 is a wasteful number, since it uses less digits than its factorization.

161161105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270888.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 161161105 is about 12694.9243794518. The cubic root of 161161105 is about 544.1935777081.

The spelling of 161161105 in words is "one hundred sixty-one million, one hundred sixty-one thousand, one hundred five".