12716644791 has 4 divisors (see below), whose sum is σ = 16955526392. Its totient is φ = 8477763192.

The previous prime is 12716644771. The next prime is 12716644859. The reversal of 12716644791 is 19744661721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19744661721 = 3 ⋅6581553907.

It is not a de Polignac number, because 12716644791 - 2¹⁹ = 12716120503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12716644791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12716644711) 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, 2119440796 + ... + 2119440801.

It is an arithmetic number, because the mean of its divisors is an integer number (4238881598).

Almost surely, 2^12716644791 is an apocalyptic number.

12716644791 is a deficient number, since it is larger than the sum of its proper divisors (4238881601).

12716644791 is an equidigital number, since it uses as much as digits as its factorization.

12716644791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238881600.

The product of its digits is 508032, while the sum is 48.

The spelling of 12716644791 in words is "twelve billion, seven hundred sixteen million, six hundred forty-four thousand, seven hundred ninety-one".