12573515909 has 2 divisors, whose sum is σ = 12573515910. Its totient is φ = 12573515908.

The previous prime is 12573515893. The next prime is 12573515951. The reversal of 12573515909 is 90951537521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11626230625 + 947285284 = 107825^2 + 30778^2 .

It is a cyclic number.

It is not a de Polignac number, because 12573515909 - 2⁴ = 12573515893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12573512909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6286757954 + 6286757955.

It is an arithmetic number, because the mean of its divisors is an integer number (6286757955).

Almost surely, 2^12573515909 is an apocalyptic number.

It is an amenable number.

12573515909 is a deficient number, since it is larger than the sum of its proper divisors (1).

12573515909 is an equidigital number, since it uses as much as digits as its factorization.

12573515909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 425250, while the sum is 47.

The spelling of 12573515909 in words is "twelve billion, five hundred seventy-three million, five hundred fifteen thousand, nine hundred nine".