12709799280 has 120 divisors (see below), whose sum is σ = 42751884240. Its totient is φ = 3383869440.

The previous prime is 12709799269. The next prime is 12709799281. The reversal of 12709799280 is 8299790721.

12709799280 is a `hidden beast` number, since 1 + 270 + 9 + 7 + 99 + 280 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12709799281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 447751 + ... + 475289.

It is an arithmetic number, because the mean of its divisors is an integer number (356265702).

Almost surely, 2^12709799280 is an apocalyptic number.

12709799280 is a gapful number since it is divisible by the number (10) 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 12709799280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21375942120).

12709799280 is an abundant number, since it is smaller than the sum of its proper divisors (30042084960).

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

12709799280 is a wasteful number, since it uses less digits than its factorization.

12709799280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28199 (or 28190 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The spelling of 12709799280 in words is "twelve billion, seven hundred nine million, seven hundred ninety-nine thousand, two hundred eighty".