12638303809 has 4 divisors (see below), whose sum is σ = 12816308160. Its totient is φ = 12460299460.

The previous prime is 12638303803. The next prime is 12638303813. The reversal of 12638303809 is 90830383621.

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 12638303809 - 2⁷ = 12638303681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12638303803) 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, 89002069 + ... + 89002210.

It is an arithmetic number, because the mean of its divisors is an integer number (3204077040).

Almost surely, 2^12638303809 is an apocalyptic number.

It is an amenable number.

12638303809 is a deficient number, since it is larger than the sum of its proper divisors (178004351).

12638303809 is an equidigital number, since it uses as much as digits as its factorization.

12638303809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178004350.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 12638303809 in words is "twelve billion, six hundred thirty-eight million, three hundred three thousand, eight hundred nine".