12654943439 has 2 divisors, whose sum is σ = 12654943440. Its totient is φ = 12654943438.

The previous prime is 12654943421. The next prime is 12654943481. The reversal of 12654943439 is 93434945621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12654943439 - 2¹⁶ = 12654877903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12654943339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6327471719 + 6327471720.

It is an arithmetic number, because the mean of its divisors is an integer number (6327471720).

Almost surely, 2^12654943439 is an apocalyptic number.

12654943439 is a deficient number, since it is larger than the sum of its proper divisors (1).

12654943439 is an equidigital number, since it uses as much as digits as its factorization.

12654943439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 50.

The spelling of 12654943439 in words is "twelve billion, six hundred fifty-four million, nine hundred forty-three thousand, four hundred thirty-nine".