12643871313 has 4 divisors (see below), whose sum is σ = 16858495088. Its totient is φ = 8429247540.

The previous prime is 12643871293. The next prime is 12643871321. The reversal of 12643871313 is 31317834621.

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 not a de Polignac number, because 12643871313 - 2⁵ = 12643871281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12643871113) 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, 2107311883 + ... + 2107311888.

It is an arithmetic number, because the mean of its divisors is an integer number (4214623772).

Almost surely, 2^12643871313 is an apocalyptic number.

It is an amenable number.

12643871313 is a deficient number, since it is larger than the sum of its proper divisors (4214623775).

12643871313 is an equidigital number, since it uses as much as digits as its factorization.

12643871313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4214623774.

The product of its digits is 72576, while the sum is 39.

The spelling of 12643871313 in words is "twelve billion, six hundred forty-three million, eight hundred seventy-one thousand, three hundred thirteen".