165759172 has 6 divisors (see below), whose sum is σ = 290078558. Its totient is φ = 82879584.

The previous prime is 165759151. The next prime is 165759199. The reversal of 165759172 is 271957561.

It can be written as a sum of positive squares in only one way, i.e., 165482496 + 276676 = 12864^2 + 526^2 .

It is a super-2 number, since 2×165759172² = 54952206204251168, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20719893 + ... + 20719900.

Almost surely, 2^165759172 is an apocalyptic number.

It is an amenable number.

165759172 is a deficient number, since it is larger than the sum of its proper divisors (124319386).

165759172 is a wasteful number, since it uses less digits than its factorization.

165759172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41439797 (or 41439795 counting only the distinct ones).

The product of its digits is 132300, while the sum is 43.

The square root of 165759172 is about 12874.7493956193. The cubic root of 165759172 is about 549.3205626620.

The spelling of 165759172 in words is "one hundred sixty-five million, seven hundred fifty-nine thousand, one hundred seventy-two".