12664443287 has 16 divisors (see below), whose sum is σ = 13712244672. Its totient is φ = 11664829440.

The previous prime is 12664443271. The next prime is 12664443313. The reversal of 12664443287 is 78234446621.

It is a cyclic number.

It is not a de Polignac number, because 12664443287 - 2⁴ = 12664443271 is a prime.

It is a Smith number, since the sum of its digits (47) 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 (12664443887) 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, 5837 + ... + 159257.

It is an arithmetic number, because the mean of its divisors is an integer number (857015292).

Almost surely, 2^12664443287 is an apocalyptic number.

12664443287 is a deficient number, since it is larger than the sum of its proper divisors (1047801385).

12664443287 is a wasteful number, since it uses less digits than its factorization.

12664443287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153578.

The product of its digits is 1548288, while the sum is 47.

The spelling of 12664443287 in words is "twelve billion, six hundred sixty-four million, four hundred forty-three thousand, two hundred eighty-seven".