11813226065 has 16 divisors (see below), whose sum is σ = 14525799120. Its totient is φ = 9217428480.

The previous prime is 11813226059. The next prime is 11813226071. The reversal of 11813226065 is 56062231811.

It is an interprime number because it is at equal distance from previous prime (11813226059) and next prime (11813226071).

It can be written as a sum of positive squares in 8 ways, for example, as 1015314496 + 10797911569 = 31864^2 + 103913^2 .

It is not a de Polignac number, because 11813226065 - 2¹⁰ = 11813225041 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1012847 + ... + 1024443.

It is an arithmetic number, because the mean of its divisors is an integer number (907862445).

Almost surely, 2^11813226065 is an apocalyptic number.

It is an amenable number.

11813226065 is a deficient number, since it is larger than the sum of its proper divisors (2712573055).

11813226065 is a wasteful number, since it uses less digits than its factorization.

11813226065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16612.

The product of its (nonzero) digits is 17280, while the sum is 35.

Adding to 11813226065 its reverse (56062231811), we get a palindrome (67875457876).

The spelling of 11813226065 in words is "eleven billion, eight hundred thirteen million, two hundred twenty-six thousand, sixty-five".