12840809696 has 48 divisors (see below), whose sum is σ = 29699995248. Its totient is φ = 5387750400.

The previous prime is 12840809687. The next prime is 12840809713. The reversal of 12840809696 is 69690804821.

It is a happy number.

It is a super-2 number, since 2×12840809696² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1398485 + ... + 1407636.

It is an arithmetic number, because the mean of its divisors is an integer number (618749901).

Almost surely, 2^12840809696 is an apocalyptic number.

12840809696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12840809696 is an abundant number, since it is smaller than the sum of its proper divisors (16859185552).

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

12840809696 is a wasteful number, since it uses less digits than its factorization.

12840809696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2806155 (or 2806147 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 12840809696 in words is "twelve billion, eight hundred forty million, eight hundred nine thousand, six hundred ninety-six".