161165170 has 8 divisors (see below), whose sum is σ = 290097324. Its totient is φ = 64466064.

The previous prime is 161165149. The next prime is 161165171. The reversal of 161165170 is 71561161.

It can be written as a sum of positive squares in 2 ways, for example, as 161010721 + 154449 = 12689^2 + 393^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×161165170² = 51948424042257800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161165171) 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, 8058249 + ... + 8058268.

Almost surely, 2^161165170 is an apocalyptic number.

161165170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161165170 is a deficient number, since it is larger than the sum of its proper divisors (128932154).

161165170 is a wasteful number, since it uses less digits than its factorization.

161165170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16116524.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 161165170 is about 12695.0844817985. The cubic root of 161165170 is about 544.1981531055.

The spelling of 161165170 in words is "one hundred sixty-one million, one hundred sixty-five thousand, one hundred seventy".