16165189 has 8 divisors (see below), whose sum is σ = 16656920. Its totient is φ = 15676416.

The previous prime is 16165187. The next prime is 16165207. The reversal of 16165189 is 98156161.

It can be written as a sum of positive squares in 4 ways, for example, as 1404225 + 14760964 = 1185^2 + 3842^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16165189 - 2¹ = 16165187 is a prime.

It is a super-2 number, since 2×16165189² = 522626670811442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16165187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15517 + ... + 16525.

It is an arithmetic number, because the mean of its divisors is an integer number (2082115).

Almost surely, 2^16165189 is an apocalyptic number.

It is an amenable number.

16165189 is a deficient number, since it is larger than the sum of its proper divisors (491731).

16165189 is a wasteful number, since it uses less digits than its factorization.

16165189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479.

The product of its digits is 12960, while the sum is 37.

The square root of 16165189 is about 4020.5956026440. The cubic root of 16165189 is about 252.8484305162.

The spelling of 16165189 in words is "sixteen million, one hundred sixty-five thousand, one hundred eighty-nine".