11816165 has 4 divisors (see below), whose sum is σ = 14179404. Its totient is φ = 9452928.

The previous prime is 11816153. The next prime is 11816183. The reversal of 11816165 is 56161811.

11816165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56161811 = 79 ⋅710909.

It can be written as a sum of positive squares in 2 ways, for example, as 1582564 + 10233601 = 1258^2 + 3199^2 .

It is a cyclic number.

It is not a de Polignac number, because 11816165 - 2⁴ = 11816149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181612 + ... + 1181621.

It is an arithmetic number, because the mean of its divisors is an integer number (3544851).

Almost surely, 2^11816165 is an apocalyptic number.

It is an amenable number.

11816165 is a deficient number, since it is larger than the sum of its proper divisors (2363239).

11816165 is an equidigital number, since it uses as much as digits as its factorization.

11816165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363238.

The product of its digits is 1440, while the sum is 29.

The square root of 11816165 is about 3437.4649089118. The cubic root of 11816165 is about 227.7677241029.

Adding to 11816165 its reverse (56161811), we get a palindrome (67977976).

The spelling of 11816165 in words is "eleven million, eight hundred sixteen thousand, one hundred sixty-five".