12143652640 has 96 divisors (see below), whose sum is σ = 32958334080. Its totient is φ = 4141891584.

The previous prime is 12143652637. The next prime is 12143652641. The reversal of 12143652640 is 4625634121.

12143652640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12143652596 and 12143652605.

It is not an unprimeable number, because it can be changed into a prime (12143652641) 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 15 ways as a sum of consecutive naturals, for example, 188071 + ... + 244249.

It is an arithmetic number, because the mean of its divisors is an integer number (343315980).

Almost surely, 2^12143652640 is an apocalyptic number.

12143652640 is a gapful number since it is divisible by the number (10) 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 12143652640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16479167040).

12143652640 is an abundant number, since it is smaller than the sum of its proper divisors (20814681440).

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

12143652640 is a wasteful number, since it uses less digits than its factorization.

12143652640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56394 (or 56386 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 12143652640 in words is "twelve billion, one hundred forty-three million, six hundred fifty-two thousand, six hundred forty".