12638272786871 has 4 divisors (see below), whose sum is σ = 12638621205672. Its totient is φ = 12637924368072.

The previous prime is 12638272786823. The next prime is 12638272786889. The reversal of 12638272786871 is 17868727283621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12638272786871 - 2¹⁰ = 12638272785847 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 (12638274786871) 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, 174154985 + ... + 174227538.

It is an arithmetic number, because the mean of its divisors is an integer number (3159655301418).

Almost surely, 2^{12638272786871} is an apocalyptic number.

12638272786871 is a deficient number, since it is larger than the sum of its proper divisors (348418801).

12638272786871 is an equidigital number, since it uses as much as digits as its factorization.

12638272786871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348418800.

The product of its digits is 151732224, while the sum is 68.

The spelling of 12638272786871 in words is "twelve trillion, six hundred thirty-eight billion, two hundred seventy-two million, seven hundred eighty-six thousand, eight hundred seventy-one".