161708168 has 16 divisors (see below), whose sum is σ = 304301580. Its totient is φ = 80561088.

The previous prime is 161708161. The next prime is 161708189. The reversal of 161708168 is 861807161.

It can be written as a sum of positive squares in 2 ways, for example, as 152720164 + 8988004 = 12358^2 + 2998^2 .

It is a super-2 number, since 2×161708168² = 52299063195832448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161708161) 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, 34271 + ... + 38702.

Almost surely, 2^161708168 is an apocalyptic number.

It is an amenable number.

161708168 is a deficient number, since it is larger than the sum of its proper divisors (142593412).

161708168 is a wasteful number, since it uses less digits than its factorization.

161708168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73256 (or 73252 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 161708168 is about 12716.4526500121. The cubic root of 161708168 is about 544.8086391549.

The spelling of 161708168 in words is "one hundred sixty-one million, seven hundred eight thousand, one hundred sixty-eight".