12840612318 has 48 divisors (see below), whose sum is σ = 28966968576. Its totient is φ = 4263111000.

The previous prime is 12840612307. The next prime is 12840612341. The reversal of 12840612318 is 81321604821.

12840612318 is a `hidden beast` number, since 1 + 2 + 8 + 4 + 0 + 612 + 31 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69355 + ... + 174617.

It is an arithmetic number, because the mean of its divisors is an integer number (603478512).

Almost surely, 2^12840612318 is an apocalyptic number.

12840612318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12840612318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14483484288).

12840612318 is an abundant number, since it is smaller than the sum of its proper divisors (16126356258).

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

12840612318 is a wasteful number, since it uses less digits than its factorization.

12840612318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105531 (or 105519 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The spelling of 12840612318 in words is "twelve billion, eight hundred forty million, six hundred twelve thousand, three hundred eighteen".