12646803456 has 240 divisors, whose sum is σ = 43175452320. Its totient is φ = 3613040640.

The previous prime is 12646803451. The next prime is 12646803469. The reversal of 12646803456 is 65430864621.

It is not an unprimeable number, because it can be changed into a prime (12646803451) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1155771 + ... + 1166661.

It is an arithmetic number, because the mean of its divisors is an integer number (179897718).

Almost surely, 2^12646803456 is an apocalyptic number.

12646803456 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 12646803456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21587726160).

12646803456 is an abundant number, since it is smaller than the sum of its proper divisors (30528648864).

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

12646803456 is an equidigital number, since it uses as much as digits as its factorization.

12646803456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10932 (or 10903 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 12646803456 in words is "twelve billion, six hundred forty-six million, eight hundred three thousand, four hundred fifty-six".