12643303440013 has 4 divisors (see below), whose sum is σ = 12643441422048. Its totient is φ = 12643165457980.

The previous prime is 12643303440011. The next prime is 12643303440029. The reversal of 12643303440013 is 31004430334621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12643303440013 - 2¹ = 12643303440011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12643303440011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68853481 + ... + 69036862.

It is an arithmetic number, because the mean of its divisors is an integer number (3160860355512).

Almost surely, 2^{12643303440013} is an apocalyptic number.

It is an amenable number.

12643303440013 is a deficient number, since it is larger than the sum of its proper divisors (137982035).

12643303440013 is an equidigital number, since it uses as much as digits as its factorization.

12643303440013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137982034.

The product of its (nonzero) digits is 62208, while the sum is 34.

Adding to 12643303440013 its reverse (31004430334621), we get a palindrome (43647733774634).

The spelling of 12643303440013 in words is "twelve trillion, six hundred forty-three billion, three hundred three million, four hundred forty thousand, thirteen".