11965208917 has 2 divisors, whose sum is σ = 11965208918. Its totient is φ = 11965208916.

The previous prime is 11965208891. The next prime is 11965208989. The reversal of 11965208917 is 71980256911.

11965208917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9921355236 + 2043853681 = 99606^2 + 45209^2 .

It is a cyclic number.

It is not a de Polignac number, because 11965208917 - 2²⁷ = 11830991189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11965208317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5982604458 + 5982604459.

It is an arithmetic number, because the mean of its divisors is an integer number (5982604459).

Almost surely, 2^11965208917 is an apocalyptic number.

It is an amenable number.

11965208917 is a deficient number, since it is larger than the sum of its proper divisors (1).

11965208917 is an equidigital number, since it uses as much as digits as its factorization.

11965208917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 49.

The spelling of 11965208917 in words is "eleven billion, nine hundred sixty-five million, two hundred eight thousand, nine hundred seventeen".