161886316 has 6 divisors (see below), whose sum is σ = 283301060. Its totient is φ = 80943156.

The previous prime is 161886313. The next prime is 161886331. The reversal of 161886316 is 613688161.

It is not an unprimeable number, because it can be changed into a prime (161886313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20235786 + ... + 20235793.

Almost surely, 2^161886316 is an apocalyptic number.

It is an amenable number.

161886316 is a deficient number, since it is larger than the sum of its proper divisors (121414744).

161886316 is a wasteful number, since it uses less digits than its factorization.

161886316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40471583 (or 40471581 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 161886316 is about 12723.4553482928. The cubic root of 161886316 is about 545.0086310111.

The spelling of 161886316 in words is "one hundred sixty-one million, eight hundred eighty-six thousand, three hundred sixteen".