11526456209 has 2 divisors, whose sum is σ = 11526456210. Its totient is φ = 11526456208.

The previous prime is 11526456169. The next prime is 11526456241. The reversal of 11526456209 is 90265462511.

11526456209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10530864400 + 995591809 = 102620^2 + 31553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11526456209 is a prime.

It is not a weakly prime, because it can be changed into another prime (11526456259) 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, 5763228104 + 5763228105.

It is an arithmetic number, because the mean of its divisors is an integer number (5763228105).

Almost surely, 2^11526456209 is an apocalyptic number.

It is an amenable number.

11526456209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11526456209 is an equidigital number, since it uses as much as digits as its factorization.

11526456209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 11526456209 in words is "eleven billion, five hundred twenty-six million, four hundred fifty-six thousand, two hundred nine".