11826715909 has 2 divisors, whose sum is σ = 11826715910. Its totient is φ = 11826715908.

The previous prime is 11826715903. The next prime is 11826715933. The reversal of 11826715909 is 90951762811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11422906884 + 403809025 = 106878^2 + 20095^2 .

It is a cyclic number.

It is not a de Polignac number, because 11826715909 - 2¹¹ = 11826713861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11826715903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5913357954 + 5913357955.

It is an arithmetic number, because the mean of its divisors is an integer number (5913357955).

Almost surely, 2^11826715909 is an apocalyptic number.

It is an amenable number.

11826715909 is a deficient number, since it is larger than the sum of its proper divisors (1).

11826715909 is an equidigital number, since it uses as much as digits as its factorization.

11826715909 is an evil number, because the sum of its binary digits is even.

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

The spelling of 11826715909 in words is "eleven billion, eight hundred twenty-six million, seven hundred fifteen thousand, nine hundred nine".