161894188 has 12 divisors (see below), whose sum is σ = 283740520. Its totient is φ = 80825472.

The previous prime is 161894167. The next prime is 161894189. The reversal of 161894188 is 881498161.

161894188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (161894189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27378 + ... + 32761.

Almost surely, 2^161894188 is an apocalyptic number.

It is an amenable number.

161894188 is a deficient number, since it is larger than the sum of its proper divisors (121846332).

161894188 is a wasteful number, since it uses less digits than its factorization.

161894188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60816 (or 60814 counting only the distinct ones).

The product of its digits is 110592, while the sum is 46.

The square root of 161894188 is about 12723.7646944605. The cubic root of 161894188 is about 545.0174648613.

The spelling of 161894188 in words is "one hundred sixty-one million, eight hundred ninety-four thousand, one hundred eighty-eight".