161986192 has 10 divisors (see below), whose sum is σ = 313848278. Its totient is φ = 80993088.

The previous prime is 161986169. The next prime is 161986207. The reversal of 161986192 is 291689161.

161986192 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 158659216 + 3326976 = 12596^2 + 1824^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5062053 + ... + 5062084.

Almost surely, 2^161986192 is an apocalyptic number.

It is an amenable number.

161986192 is a deficient number, since it is larger than the sum of its proper divisors (151862086).

161986192 is a wasteful number, since it uses less digits than its factorization.

161986192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10124145 (or 10124139 counting only the distinct ones).

The product of its digits is 46656, while the sum is 43.

The square root of 161986192 is about 12727.3796203303. The cubic root of 161986192 is about 545.1206892607.

The spelling of 161986192 in words is "one hundred sixty-one million, nine hundred eighty-six thousand, one hundred ninety-two".