12973144438 has 4 divisors (see below), whose sum is σ = 19459716660. Its totient is φ = 6486572218.

The previous prime is 12973144433. The next prime is 12973144441. The reversal of 12973144438 is 83444137921.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12973144433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3243286108 + ... + 3243286111.

It is an arithmetic number, because the mean of its divisors is an integer number (4864929165).

Almost surely, 2^12973144438 is an apocalyptic number.

12973144438 is a deficient number, since it is larger than the sum of its proper divisors (6486572222).

12973144438 is an equidigital number, since it uses as much as digits as its factorization.

12973144438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6486572221.

The product of its digits is 580608, while the sum is 46.

The spelling of 12973144438 in words is "twelve billion, nine hundred seventy-three million, one hundred forty-four thousand, four hundred thirty-eight".