12573807581 has 2 divisors, whose sum is σ = 12573807582. Its totient is φ = 12573807580.

The previous prime is 12573807557. The next prime is 12573807611. The reversal of 12573807581 is 18570837521.

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., 12187056025 + 386751556 = 110395^2 + 19666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12573807581 is a prime.

It is a super-2 number, since 2×12573807581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12573807481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6286903790 + 6286903791.

It is an arithmetic number, because the mean of its divisors is an integer number (6286903791).

Almost surely, 2^12573807581 is an apocalyptic number.

It is an amenable number.

12573807581 is a deficient number, since it is larger than the sum of its proper divisors (1).

12573807581 is an equidigital number, since it uses as much as digits as its factorization.

12573807581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 470400, while the sum is 47.

The spelling of 12573807581 in words is "twelve billion, five hundred seventy-three million, eight hundred seven thousand, five hundred eighty-one".