12643534624 has 96 divisors (see below), whose sum is σ = 29654190720. Its totient is φ = 5193289728.

The previous prime is 12643534619. The next prime is 12643534639. The reversal of 12643534624 is 42643534621.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543912 + ... + 566680.

It is an arithmetic number, because the mean of its divisors is an integer number (308897820).

Almost surely, 2^12643534624 is an apocalyptic number.

12643534624 is a gapful number since it is divisible by the number (14) 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 12643534624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14827095360).

12643534624 is an abundant number, since it is smaller than the sum of its proper divisors (17010656096).

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

12643534624 is a wasteful number, since it uses less digits than its factorization.

12643534624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22890 (or 22882 counting only the distinct ones).

The product of its digits is 414720, while the sum is 40.

The spelling of 12643534624 in words is "twelve billion, six hundred forty-three million, five hundred thirty-four thousand, six hundred twenty-four".