16401165 has 16 divisors (see below), whose sum is σ = 28627776. Its totient is φ = 7952000.

The previous prime is 16401163. The next prime is 16401169. The reversal of 16401165 is 56110461.

16401165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16401165 - 2¹ = 16401163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16401163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49536 + ... + 49865.

It is an arithmetic number, because the mean of its divisors is an integer number (1789236).

Almost surely, 2^16401165 is an apocalyptic number.

16401165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16401165 is a deficient number, since it is larger than the sum of its proper divisors (12226611).

16401165 is a wasteful number, since it uses less digits than its factorization.

16401165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99420.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 16401165 is about 4049.8351818315. The cubic root of 16401165 is about 254.0728344251.

The spelling of 16401165 in words is "sixteen million, four hundred one thousand, one hundred sixty-five".