12681368994 has 128 divisors (see below), whose sum is σ = 32489994240. Its totient is φ = 3215729664.

The previous prime is 12681368993. The next prime is 12681369017. The reversal of 12681368994 is 49986318621.

It is not an unprimeable number, because it can be changed into a prime (12681368993) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 883237 + ... + 897479.

It is an arithmetic number, because the mean of its divisors is an integer number (253828080).

Almost surely, 2^12681368994 is an apocalyptic number.

12681368994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12681368994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16244997120).

12681368994 is an abundant number, since it is smaller than the sum of its proper divisors (19808625246).

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

12681368994 is a wasteful number, since it uses less digits than its factorization.

12681368994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14344.

The product of its digits is 4478976, while the sum is 57.

The spelling of 12681368994 in words is "twelve billion, six hundred eighty-one million, three hundred sixty-eight thousand, nine hundred ninety-four".