12799999999 has 4 divisors (see below), whose sum is σ = 12800902864. Its totient is φ = 12799097136.

The previous prime is 12799999981. The next prime is 12800000021. The reversal of 12799999999 is 99999999721.

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 12799999999 - 2⁷ = 12799999871 is a prime.

It is a Duffinian number.

12799999999 is a modest number, since divided by 999999 gives 12799 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12799999699) 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, 429822 + ... + 458635.

It is an arithmetic number, because the mean of its divisors is an integer number (3200225716).

Almost surely, 2^12799999999 is an apocalyptic number.

12799999999 is a deficient number, since it is larger than the sum of its proper divisors (902865).

12799999999 is an equidigital number, since it uses as much as digits as its factorization.

12799999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902864.

The product of its digits is 602654094, while the sum is 82.

It can be divided in two parts, 1279 and 9999999, that multiplied together give a palindrome (12789998721).

The spelling of 12799999999 in words is "twelve billion, seven hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".