11385326809 has 2 divisors, whose sum is σ = 11385326810. Its totient is φ = 11385326808.

The previous prime is 11385326783. The next prime is 11385326873. The reversal of 11385326809 is 90862358311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11124342784 + 260984025 = 105472^2 + 16155^2 .

It is a cyclic number.

It is not a de Polignac number, because 11385326809 - 2¹⁹ = 11384802521 is a prime.

It is not a weakly prime, because it can be changed into another prime (11385326609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5692663404 + 5692663405.

It is an arithmetic number, because the mean of its divisors is an integer number (5692663405).

Almost surely, 2^11385326809 is an apocalyptic number.

It is an amenable number.

11385326809 is a deficient number, since it is larger than the sum of its proper divisors (1).

11385326809 is an equidigital number, since it uses as much as digits as its factorization.

11385326809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 46.

It can be divided in two parts, 1138532 and 6809, that added together give a triangular number (1145341 = T₁₅₁₃).

The spelling of 11385326809 in words is "eleven billion, three hundred eighty-five million, three hundred twenty-six thousand, eight hundred nine".