12544247843 has 2 divisors, whose sum is σ = 12544247844. Its totient is φ = 12544247842.

The previous prime is 12544247791. The next prime is 12544247851. The reversal of 12544247843 is 34874244521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12544247843 is a prime.

It is a super-2 number, since 2×12544247843² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12544247794 and 12544247803.

It is not a weakly prime, because it can be changed into another prime (12544247893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6272123921 + 6272123922.

It is an arithmetic number, because the mean of its divisors is an integer number (6272123922).

Almost surely, 2^12544247843 is an apocalyptic number.

12544247843 is a deficient number, since it is larger than the sum of its proper divisors (1).

12544247843 is an equidigital number, since it uses as much as digits as its factorization.

12544247843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 860160, while the sum is 44.

The spelling of 12544247843 in words is "twelve billion, five hundred forty-four million, two hundred forty-seven thousand, eight hundred forty-three".