12799999998 has 32 divisors (see below), whose sum is σ = 28454400000. Its totient is φ = 4265173368.

The previous prime is 12799999981. The next prime is 12800000021. The reversal of 12799999998 is 89999999721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120003 + ... + 200001.

It is an arithmetic number, because the mean of its divisors is an integer number (889200000).

Almost surely, 2^12799999998 is an apocalyptic number.

12799999998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12799999998 is an abundant number, since it is smaller than the sum of its proper divisors (15654400002).

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

12799999998 is a wasteful number, since it uses less digits than its factorization.

12799999998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82973 (or 82967 counting only the distinct ones).

The product of its digits is 535692528, while the sum is 81.

The spelling of 12799999998 in words is "twelve billion, seven hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-eight".