11425515209 has 2 divisors, whose sum is σ = 11425515210. Its totient is φ = 11425515208.

The previous prime is 11425515203. The next prime is 11425515229. The reversal of 11425515209 is 90251552411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8231569984 + 3193945225 = 90728^2 + 56515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11425515209 is a prime.

It is not a weakly prime, because it can be changed into another prime (11425515203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5712757604 + 5712757605.

It is an arithmetic number, because the mean of its divisors is an integer number (5712757605).

Almost surely, 2^11425515209 is an apocalyptic number.

It is an amenable number.

11425515209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11425515209 is an equidigital number, since it uses as much as digits as its factorization.

11425515209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 35.

The spelling of 11425515209 in words is "eleven billion, four hundred twenty-five million, five hundred fifteen thousand, two hundred nine".