12638726722 has 8 divisors (see below), whose sum is σ = 19569641472. Its totient is φ = 6115512900.

The previous prime is 12638726719. The next prime is 12638726747. The reversal of 12638726722 is 22762783621.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101925154 + ... + 101925277.

It is an arithmetic number, because the mean of its divisors is an integer number (2446205184).

Almost surely, 2^12638726722 is an apocalyptic number.

12638726722 is a deficient number, since it is larger than the sum of its proper divisors (6930914750).

12638726722 is a wasteful number, since it uses less digits than its factorization.

12638726722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203850464.

The product of its digits is 677376, while the sum is 46.

The spelling of 12638726722 in words is "twelve billion, six hundred thirty-eight million, seven hundred twenty-six thousand, seven hundred twenty-two".