11643165 has 12 divisors (see below), whose sum is σ = 20181564. Its totient is φ = 6209664.

The previous prime is 11643161. The next prime is 11643209. The reversal of 11643165 is 56134611.

11643165 is a `hidden beast` number, since 1 + 1 + 643 + 16 + 5 = 666.

11643165 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2893401 + 8749764 = 1701^2 + 2958^2 .

It is not a de Polignac number, because 11643165 - 2² = 11643161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11643161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129324 + ... + 129413.

It is an arithmetic number, because the mean of its divisors is an integer number (1681797).

Almost surely, 2^11643165 is an apocalyptic number.

11643165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11643165 is a deficient number, since it is larger than the sum of its proper divisors (8538399).

11643165 is a wasteful number, since it uses less digits than its factorization.

11643165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258748 (or 258745 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 11643165 is about 3412.2082292850. The cubic root of 11643165 is about 226.6506752944.

Adding to 11643165 its reverse (56134611), we get a palindrome (67777776).

The spelling of 11643165 in words is "eleven million, six hundred forty-three thousand, one hundred sixty-five".