12638958789 has 8 divisors (see below), whose sum is σ = 16852501792. Its totient is φ = 8425694160.

The previous prime is 12638958763. The next prime is 12638958803. The reversal of 12638958789 is 98785983621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12638958789 - 2¹¹ = 12638956741 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 (12638958749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86127 + ... + 180819.

It is an arithmetic number, because the mean of its divisors is an integer number (2106562724).

Almost surely, 2^12638958789 is an apocalyptic number.

It is an amenable number.

12638958789 is a deficient number, since it is larger than the sum of its proper divisors (4213543003).

12638958789 is an equidigital number, since it uses as much as digits as its factorization.

12638958789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139187.

The product of its digits is 52254720, while the sum is 66.

The spelling of 12638958789 in words is "twelve billion, six hundred thirty-eight million, nine hundred fifty-eight thousand, seven hundred eighty-nine".