12638064722 has 8 divisors (see below), whose sum is σ = 19061832972. Its totient is φ = 6284120400.

The previous prime is 12638064713. The next prime is 12638064739. The reversal of 12638064722 is 22746083621.

It can be written as a sum of positive squares in 2 ways, for example, as 9445701721 + 3192363001 = 97189^2 + 56501^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 12638064722.

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, 17455529 + ... + 17456252.

Almost surely, 2^12638064722 is an apocalyptic number.

12638064722 is a deficient number, since it is larger than the sum of its proper divisors (6423768250).

12638064722 is a wasteful number, since it uses less digits than its factorization.

12638064722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34911964.

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 12638064722 in words is "twelve billion, six hundred thirty-eight million, sixty-four thousand, seven hundred twenty-two".