12340646656 has 72 divisors (see below), whose sum is σ = 27383909504. Its totient is φ = 5511905280.

The previous prime is 12340646651. The next prime is 12340646713. The reversal of 12340646656 is 65664604321.

12340646656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12340646651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43360 + ... + 162976.

Almost surely, 2^12340646656 is an apocalyptic number.

12340646656 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 12340646656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13691954752).

12340646656 is an abundant number, since it is smaller than the sum of its proper divisors (15043262848).

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

12340646656 is a wasteful number, since it uses less digits than its factorization.

12340646656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119677 (or 119663 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 12340646656 in words is "twelve billion, three hundred forty million, six hundred forty-six thousand, six hundred fifty-six".