161900176 has 15 divisors (see below), whose sum is σ = 313780233. Its totient is φ = 80924640.

The previous prime is 161900171. The next prime is 161900177. The reversal of 161900176 is 671009161.

The square root of 161900176 is 12724.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 12082576 + 149817600 = 3476^2 + 12240^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161900171) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 49306 + ... + 52486.

Almost surely, 2^161900176 is an apocalyptic number.

161900176 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

161900176 is the 12724-th square number.

It is an amenable number.

161900176 is a deficient number, since it is larger than the sum of its proper divisors (151880057).

161900176 is an frugal number, since it uses more digits than its factorization.

161900176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6370 (or 3183 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 31.

The cubic root of 161900176 is about 545.0241843209.

The spelling of 161900176 in words is "one hundred sixty-one million, nine hundred thousand, one hundred seventy-six".