12638726723 has 8 divisors (see below), whose sum is σ = 14447838048. Its totient is φ = 10830510144.

The previous prime is 12638726719. The next prime is 12638726747. The reversal of 12638726723 is 32762783621.

12638726723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12638726723 - 2² = 12638726719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12638726423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193136 + ... + 250157.

It is an arithmetic number, because the mean of its divisors is an integer number (1805979756).

Almost surely, 2^12638726723 is an apocalyptic number.

12638726723 is a deficient number, since it is larger than the sum of its proper divisors (1809111325).

12638726723 is an equidigital number, since it uses as much as digits as its factorization.

12638726723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447373.

The product of its digits is 1016064, while the sum is 47.

The spelling of 12638726723 in words is "twelve billion, six hundred thirty-eight million, seven hundred twenty-six thousand, seven hundred twenty-three".