12944487426 has 64 divisors (see below), whose sum is σ = 28287439488. Its totient is φ = 3925168128.

The previous prime is 12944487403. The next prime is 12944487427. The reversal of 12944487426 is 62478444921.

It is not an unprimeable number, because it can be changed into a prime (12944487427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1640226 + ... + 1648098.

It is an arithmetic number, because the mean of its divisors is an integer number (441991242).

Almost surely, 2^12944487426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12944487426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14143719744).

12944487426 is an abundant number, since it is smaller than the sum of its proper divisors (15342952062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12944487426 is a wasteful number, since it uses less digits than its factorization.

12944487426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8195.

The product of its digits is 3096576, while the sum is 51.

The spelling of 12944487426 in words is "twelve billion, nine hundred forty-four million, four hundred eighty-seven thousand, four hundred twenty-six".