12431242693537 has 2 divisors, whose sum is σ = 12431242693538. Its totient is φ = 12431242693536.

The previous prime is 12431242693523. The next prime is 12431242693577. The reversal of 12431242693537 is 73539624213421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12422516144481 + 8726549056 = 3524559^2 + 93416^2 .

It is an emirp because it is prime and its reverse (73539624213421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12431242693537 - 2⁷ = 12431242693409 is a prime.

It is not a weakly prime, because it can be changed into another prime (12431242693577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6215621346768 + 6215621346769.

It is an arithmetic number, because the mean of its divisors is an integer number (6215621346769).

Almost surely, 2^{12431242693537} is an apocalyptic number.

It is an amenable number.

12431242693537 is a deficient number, since it is larger than the sum of its proper divisors (1).

12431242693537 is an equidigital number, since it uses as much as digits as its factorization.

12431242693537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 52.

The spelling of 12431242693537 in words is "twelve trillion, four hundred thirty-one billion, two hundred forty-two million, six hundred ninety-three thousand, five hundred thirty-seven".