11585500909 has 2 divisors, whose sum is σ = 11585500910. Its totient is φ = 11585500908.

The previous prime is 11585500897. The next prime is 11585501089. The reversal of 11585500909 is 90900558511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6561810025 + 5023690884 = 81005^2 + 70878^2 .

It is a cyclic number.

It is not a de Polignac number, because 11585500909 - 2⁵ = 11585500877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11585501909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5792750454 + 5792750455.

It is an arithmetic number, because the mean of its divisors is an integer number (5792750455).

Almost surely, 2^11585500909 is an apocalyptic number.

It is an amenable number.

11585500909 is a deficient number, since it is larger than the sum of its proper divisors (1).

11585500909 is an equidigital number, since it uses as much as digits as its factorization.

11585500909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 43.

The spelling of 11585500909 in words is "eleven billion, five hundred eighty-five million, five hundred thousand, nine hundred nine".