161328986 has 32 divisors (see below), whose sum is σ = 298478208. Its totient is φ = 63685440.

The previous prime is 161328971. The next prime is 161329027. The reversal of 161328986 is 689823161.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147056 + ... + 148148.

It is an arithmetic number, because the mean of its divisors is an integer number (9327444).

Almost surely, 2^161328986 is an apocalyptic number.

161328986 is a deficient number, since it is larger than the sum of its proper divisors (137149222).

161328986 is a wasteful number, since it uses less digits than its factorization.

161328986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926.

The product of its digits is 124416, while the sum is 44.

The square root of 161328986 is about 12701.5347891505. The cubic root of 161328986 is about 544.3824736937.

The spelling of 161328986 in words is "one hundred sixty-one million, three hundred twenty-eight thousand, nine hundred eighty-six".