161188474 has 16 divisors (see below), whose sum is σ = 250983936. Its totient is φ = 77583600.

The previous prime is 161188429. The next prime is 161188481. The reversal of 161188474 is 474881161.

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, 8322 + ... + 19789.

It is an arithmetic number, because the mean of its divisors is an integer number (15686496).

Almost surely, 2^161188474 is an apocalyptic number.

161188474 is a deficient number, since it is larger than the sum of its proper divisors (89795462).

161188474 is a wasteful number, since it uses less digits than its factorization.

161188474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28221.

The product of its digits is 43008, while the sum is 40.

The square root of 161188474 is about 12696.0022841838. The cubic root of 161188474 is about 544.2243816481.

The spelling of 161188474 in words is "one hundred sixty-one million, one hundred eighty-eight thousand, four hundred seventy-four".