11636161 has 4 divisors (see below), whose sum is σ = 11647152. Its totient is φ = 11625172.

The previous prime is 11636159. The next prime is 11636173. The reversal of 11636161 is 16163611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16163611 = 769 ⋅21019.

It is a cyclic number.

It is not a de Polignac number, because 11636161 - 2¹ = 11636159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11636461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3715 + ... + 6088.

It is an arithmetic number, because the mean of its divisors is an integer number (2911788).

Almost surely, 2^11636161 is an apocalyptic number.

It is an amenable number.

11636161 is a deficient number, since it is larger than the sum of its proper divisors (10991).

11636161 is an equidigital number, since it uses as much as digits as its factorization.

11636161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10990.

The product of its digits is 648, while the sum is 25.

The square root of 11636161 is about 3411.1817600357. The cubic root of 11636161 is about 226.6052185893.

Adding to 11636161 its reverse (16163611), we get a palindrome (27799772).

The spelling of 11636161 in words is "eleven million, six hundred thirty-six thousand, one hundred sixty-one".