12801338449 has 3 divisors (see below), whose sum is σ = 12801451593. Its totient is φ = 12801225306.

The previous prime is 12801338443. The next prime is 12801338479. The reversal of 12801338449 is 94483310821.

The square root of 12801338449 is 113143.

It is a perfect power (a square), and thus also a powerful number.

12801338449 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, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 12801338449 - 2⁹ = 12801337937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12801338443) 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 2 ways as a sum of consecutive naturals, for example, 56572 + ... + 169714.

It is an arithmetic number, because the mean of its divisors is an integer number (4267150531).

Almost surely, 2^12801338449 is an apocalyptic number.

12801338449 is the 113143-rd square number.

12801338449 is the 56572-nd centered octagonal number.

It is an amenable number.

12801338449 is a deficient number, since it is larger than the sum of its proper divisors (113144).

12801338449 is an frugal number, since it uses more digits than its factorization.

12801338449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226286 (or 113143 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 12801338449 in words is "twelve billion, eight hundred one million, three hundred thirty-eight thousand, four hundred forty-nine".