12543303643 has 4 divisors (see below), whose sum is σ = 13508173168. Its totient is φ = 11578434120.

The previous prime is 12543303599. The next prime is 12543303683. The reversal of 12543303643 is 34630334521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12543303643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12543303599 and 12543303608.

It is not an unprimeable number, because it can be changed into a prime (12543303683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482434743 + ... + 482434768.

It is an arithmetic number, because the mean of its divisors is an integer number (3377043292).

Almost surely, 2^12543303643 is an apocalyptic number.

12543303643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12543303643 is a deficient number, since it is larger than the sum of its proper divisors (964869525).

12543303643 is an equidigital number, since it uses as much as digits as its factorization.

12543303643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964869524.

The product of its (nonzero) digits is 77760, while the sum is 34.

The spelling of 12543303643 in words is "twelve billion, five hundred forty-three million, three hundred three thousand, six hundred forty-three".