11643225065 has 4 divisors (see below), whose sum is σ = 13971870084. Its totient is φ = 9314580048.

The previous prime is 11643225053. The next prime is 11643225119. The reversal of 11643225065 is 56052234611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4554090256 + 7089134809 = 67484^2 + 84197^2 .

It is a cyclic number.

It is not a de Polignac number, because 11643225065 - 2²⁸ = 11374789609 is a prime.

It is a Duffinian 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, 1164322502 + ... + 1164322511.

It is an arithmetic number, because the mean of its divisors is an integer number (3492967521).

Almost surely, 2^11643225065 is an apocalyptic number.

It is an amenable number.

11643225065 is a deficient number, since it is larger than the sum of its proper divisors (2328645019).

11643225065 is an equidigital number, since it uses as much as digits as its factorization.

11643225065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328645018.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 11643225065 its reverse (56052234611), we get a palindrome (67695459676).

The spelling of 11643225065 in words is "eleven billion, six hundred forty-three million, two hundred twenty-five thousand, sixty-five".