8640165 has 32 divisors (see below), whose sum is σ = 15123456. Its totient is φ = 4193280.

The previous prime is 8640161. The next prime is 8640169. The reversal of 8640165 is 5610468.

8640165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8640161) and next prime (8640169).

It is not a de Polignac number, because 8640165 - 2² = 8640161 is a prime.

8640165 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8640161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7359 + ... + 8451.

It is an arithmetic number, because the mean of its divisors is an integer number (472608).

Almost surely, 2^8640165 is an apocalyptic number.

8640165 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8640165 is a deficient number, since it is larger than the sum of its proper divisors (6483291).

8640165 is a wasteful number, since it uses less digits than its factorization.

8640165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 8640165 is about 2939.4157582758. The cubic root of 8640165 is about 205.1984198245.

The spelling of 8640165 in words is "eight million, six hundred forty thousand, one hundred sixty-five".