12643227240 has 256 divisors, whose sum is σ = 44895928320. Its totient is φ = 2787333120.

The previous prime is 12643227217. The next prime is 12643227241. The reversal of 12643227240 is 4272234621.

It is not an unprimeable number, because it can be changed into a prime (12643227241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10337269 + ... + 10338491.

It is an arithmetic number, because the mean of its divisors is an integer number (175374720).

Almost surely, 2^12643227240 is an apocalyptic number.

12643227240 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 12643227240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22447964160).

12643227240 is an abundant number, since it is smaller than the sum of its proper divisors (32252701080).

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

12643227240 is a wasteful number, since it uses less digits than its factorization.

12643227240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672 (or 1668 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 33.

The spelling of 12643227240 in words is "twelve billion, six hundred forty-three million, two hundred twenty-seven thousand, two hundred forty".