12945436591 has 2 divisors, whose sum is σ = 12945436592. Its totient is φ = 12945436590.

The previous prime is 12945436589. The next prime is 12945436627. The reversal of 12945436591 is 19563454921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12945436591 - 2¹ = 12945436589 is a prime.

Together with 12945436589, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12945436501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6472718295 + 6472718296.

It is an arithmetic number, because the mean of its divisors is an integer number (6472718296).

Almost surely, 2^12945436591 is an apocalyptic number.

12945436591 is a deficient number, since it is larger than the sum of its proper divisors (1).

12945436591 is an equidigital number, since it uses as much as digits as its factorization.

12945436591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 49.

The spelling of 12945436591 in words is "twelve billion, nine hundred forty-five million, four hundred thirty-six thousand, five hundred ninety-one".