12644257141 has 4 divisors (see below), whose sum is σ = 12651889612. Its totient is φ = 12636624672.

The previous prime is 12644257111. The next prime is 12644257147. The reversal of 12644257141 is 14175244621.

12644257141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1712718225 + 10931538916 = 41385^2 + 104554^2 .

It is a cyclic number.

It is not a de Polignac number, because 12644257141 - 2²¹ = 12642159989 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 12644257141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12644257147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3813750 + ... + 3817063.

It is an arithmetic number, because the mean of its divisors is an integer number (3162972403).

Almost surely, 2^12644257141 is an apocalyptic number.

It is an amenable number.

12644257141 is a deficient number, since it is larger than the sum of its proper divisors (7632471).

12644257141 is an equidigital number, since it uses as much as digits as its factorization.

12644257141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7632470.

The product of its digits is 53760, while the sum is 37.

The spelling of 12644257141 in words is "twelve billion, six hundred forty-four million, two hundred fifty-seven thousand, one hundred forty-one".