11115344809 has 2 divisors, whose sum is σ = 11115344810. Its totient is φ = 11115344808.

The previous prime is 11115344783. The next prime is 11115344827. The reversal of 11115344809 is 90844351111.

11115344809 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., 11113376400 + 1968409 = 105420^2 + 1403^2 .

It is a cyclic number.

It is not a de Polignac number, because 11115344809 - 2²¹ = 11113247657 is a prime.

It is not a weakly prime, because it can be changed into another prime (11115344309) 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, 5557672404 + 5557672405.

It is an arithmetic number, because the mean of its divisors is an integer number (5557672405).

Almost surely, 2^11115344809 is an apocalyptic number.

It is an amenable number.

11115344809 is a deficient number, since it is larger than the sum of its proper divisors (1).

11115344809 is an equidigital number, since it uses as much as digits as its factorization.

11115344809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 11115344809 in words is "eleven billion, one hundred fifteen million, three hundred forty-four thousand, eight hundred nine".