16165505 has 8 divisors (see below), whose sum is σ = 19523112. Its totient is φ = 12849408.

The previous prime is 16165489. The next prime is 16165507. The reversal of 16165505 is 50556161.

16165505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4048144 + 12117361 = 2012^2 + 3481^2 .

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 16165505 - 2⁴ = 16165489 is a prime.

It is a super-2 number, since 2×16165505² = 522647103810050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16165507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9512 + ... + 11081.

It is an arithmetic number, because the mean of its divisors is an integer number (2440389).

Almost surely, 2^16165505 is an apocalyptic number.

It is an amenable number.

16165505 is a deficient number, since it is larger than the sum of its proper divisors (3357607).

16165505 is a wasteful number, since it uses less digits than its factorization.

16165505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20755.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 16165505 is about 4020.6349001122. The cubic root of 16165505 is about 252.8500780809.

The spelling of 16165505 in words is "sixteen million, one hundred sixty-five thousand, five hundred five".