12638054854643 has 2 divisors, whose sum is σ = 12638054854644. Its totient is φ = 12638054854642.

The previous prime is 12638054854609. The next prime is 12638054854679. The reversal of 12638054854643 is 34645845083621.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12638054854643 is a prime.

It is not a weakly prime, because it can be changed into another prime (12638054854693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6319027427321 + 6319027427322.

It is an arithmetic number, because the mean of its divisors is an integer number (6319027427322).

Almost surely, 2^{12638054854643} is an apocalyptic number.

12638054854643 is a deficient number, since it is larger than the sum of its proper divisors (1).

12638054854643 is an equidigital number, since it uses as much as digits as its factorization.

12638054854643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66355200, while the sum is 59.

The spelling of 12638054854643 in words is "twelve trillion, six hundred thirty-eight billion, fifty-four million, eight hundred fifty-four thousand, six hundred forty-three".