12440799491 has 2 divisors, whose sum is σ = 12440799492. Its totient is φ = 12440799490.

The previous prime is 12440799487. The next prime is 12440799541. The reversal of 12440799491 is 19499704421.

It is an a-pointer prime, because the next prime (12440799541) can be obtained adding 12440799491 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12440799491 - 2² = 12440799487 is a prime.

It is not a weakly prime, because it can be changed into another prime (12440799401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6220399745 + 6220399746.

It is an arithmetic number, because the mean of its divisors is an integer number (6220399746).

Almost surely, 2^12440799491 is an apocalyptic number.

12440799491 is a deficient number, since it is larger than the sum of its proper divisors (1).

12440799491 is an equidigital number, since it uses as much as digits as its factorization.

12440799491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 12440799491 in words is "twelve billion, four hundred forty million, seven hundred ninety-nine thousand, four hundred ninety-one".