11144420509 has 2 divisors, whose sum is σ = 11144420510. Its totient is φ = 11144420508.

The previous prime is 11144420491. The next prime is 11144420579. The reversal of 11144420509 is 90502444111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8353411609 + 2791008900 = 91397^2 + 52830^2 .

It is a cyclic number.

It is not a de Polignac number, because 11144420509 - 2⁵ = 11144420477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11144420579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5572210254 + 5572210255.

It is an arithmetic number, because the mean of its divisors is an integer number (5572210255).

Almost surely, 2^11144420509 is an apocalyptic number.

It is an amenable number.

11144420509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11144420509 is an equidigital number, since it uses as much as digits as its factorization.

11144420509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 11144420509 in words is "eleven billion, one hundred forty-four million, four hundred twenty thousand, five hundred nine".