12643046443 has 4 divisors (see below), whose sum is σ = 13308469960. Its totient is φ = 11977622928.

The previous prime is 12643046333. The next prime is 12643046461. The reversal of 12643046443 is 34464034621.

12643046443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34464034621 = 19 ⋅1813896559.

It is a cyclic number.

It is not a de Polignac number, because 12643046443 - 2¹³ = 12643038251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12643046473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332711730 + ... + 332711767.

It is an arithmetic number, because the mean of its divisors is an integer number (3327117490).

Almost surely, 2^12643046443 is an apocalyptic number.

12643046443 is a deficient number, since it is larger than the sum of its proper divisors (665423517).

12643046443 is an equidigital number, since it uses as much as digits as its factorization.

12643046443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665423516.

The product of its (nonzero) digits is 165888, while the sum is 37.

The spelling of 12643046443 in words is "twelve billion, six hundred forty-three million, forty-six thousand, four hundred forty-three".