12647444727 has 16 divisors (see below), whose sum is σ = 17037130880. Its totient is φ = 8344868832.

The previous prime is 12647444717. The next prime is 12647444731. The reversal of 12647444727 is 72744474621.

It is not a de Polignac number, because 12647444727 - 2¹⁶ = 12647379191 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12647444717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275268 + ... + 317910.

It is an arithmetic number, because the mean of its divisors is an integer number (1064820680).

Almost surely, 2^12647444727 is an apocalyptic number.

12647444727 is a deficient number, since it is larger than the sum of its proper divisors (4389686153).

12647444727 is a wasteful number, since it uses less digits than its factorization.

12647444727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43662.

The product of its digits is 2107392, while the sum is 48.

The spelling of 12647444727 in words is "twelve billion, six hundred forty-seven million, four hundred forty-four thousand, seven hundred twenty-seven".