12638747796674 has 8 divisors (see below), whose sum is σ = 18958160011068. Its totient is φ = 6319361126320.

The previous prime is 12638747796673. The next prime is 12638747796679. The reversal of 12638747796674 is 47669774783621.

It can be written as a sum of positive squares in 2 ways, for example, as 12237102396649 + 401645400025 = 3498157^2 + 633755^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 12638747796595 and 12638747796604.

It is not an unprimeable number, because it can be changed into a prime (12638747796673) 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, 5097017 + ... + 7159404.

Almost surely, 2^{12638747796674} is an apocalyptic number.

12638747796674 is a deficient number, since it is larger than the sum of its proper divisors (6319412214394).

12638747796674 is a wasteful number, since it uses less digits than its factorization.

12638747796674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12772020.

The product of its digits is 3584673792, while the sum is 77.

The spelling of 12638747796674 in words is "twelve trillion, six hundred thirty-eight billion, seven hundred forty-seven million, seven hundred ninety-six thousand, six hundred seventy-four".