11665109469817 has 2 divisors, whose sum is σ = 11665109469818. Its totient is φ = 11665109469816.

The previous prime is 11665109469809. The next prime is 11665109469841. The reversal of 11665109469817 is 71896490156611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9400975342201 + 2264134127616 = 3066101^2 + 1504704^2 .

It is a cyclic number.

It is not a de Polignac number, because 11665109469817 - 2³ = 11665109469809 is a prime.

It is not a weakly prime, because it can be changed into another prime (11665109469017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5832554734908 + 5832554734909.

It is an arithmetic number, because the mean of its divisors is an integer number (5832554734909).

Almost surely, 2^{11665109469817} is an apocalyptic number.

It is an amenable number.

11665109469817 is a deficient number, since it is larger than the sum of its proper divisors (1).

11665109469817 is an equidigital number, since it uses as much as digits as its factorization.

11665109469817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19595520, while the sum is 64.

The spelling of 11665109469817 in words is "eleven trillion, six hundred sixty-five billion, one hundred nine million, four hundred sixty-nine thousand, eight hundred seventeen".