11247126809 has 2 divisors, whose sum is σ = 11247126810. Its totient is φ = 11247126808.

The previous prime is 11247126773. The next prime is 11247126829. The reversal of 11247126809 is 90862174211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9806544784 + 1440582025 = 99028^2 + 37955^2 .

It is a cyclic number.

It is not a de Polignac number, because 11247126809 - 2²⁴ = 11230349593 is a prime.

It is a super-2 number, since 2×11247126809² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11247126829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5623563404 + 5623563405.

It is an arithmetic number, because the mean of its divisors is an integer number (5623563405).

Almost surely, 2^11247126809 is an apocalyptic number.

It is an amenable number.

11247126809 is a deficient number, since it is larger than the sum of its proper divisors (1).

11247126809 is an equidigital number, since it uses as much as digits as its factorization.

11247126809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 41.

The spelling of 11247126809 in words is "eleven billion, two hundred forty-seven million, one hundred twenty-six thousand, eight hundred nine".