12801817579 has 4 divisors (see below), whose sum is σ = 12804269176. Its totient is φ = 12799365984.

The previous prime is 12801817571. The next prime is 12801817601. The reversal of 12801817579 is 97571810821.

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

It is a cyclic number.

It is not a de Polignac number, because 12801817579 - 2³ = 12801817571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12801817571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1217949 + ... + 1228414.

It is an arithmetic number, because the mean of its divisors is an integer number (3201067294).

Almost surely, 2^12801817579 is an apocalyptic number.

12801817579 is a deficient number, since it is larger than the sum of its proper divisors (2451597).

12801817579 is an equidigital number, since it uses as much as digits as its factorization.

12801817579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451596.

The product of its (nonzero) digits is 282240, while the sum is 49.

The spelling of 12801817579 in words is "twelve billion, eight hundred one million, eight hundred seventeen thousand, five hundred seventy-nine".