12891799296 has 252 divisors, whose sum is σ = 39646196632. Its totient is φ = 4178884608.

The previous prime is 12891799267. The next prime is 12891799309. The reversal of 12891799296 is 69299719821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 6904155 + ... + 6906021.

Almost surely, 2^12891799296 is an apocalyptic number.

12891799296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12891799296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19823098316).

12891799296 is an abundant number, since it is smaller than the sum of its proper divisors (26754397336).

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

12891799296 is an frugal number, since it uses more digits than its factorization.

12891799296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938 (or 1909 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 63.

The spelling of 12891799296 in words is "twelve billion, eight hundred ninety-one million, seven hundred ninety-nine thousand, two hundred ninety-six".