12440640108 has 96 divisors (see below), whose sum is σ = 34337318400. Its totient is φ = 3468731904.

The previous prime is 12440640083. The next prime is 12440640109. The reversal of 12440640108 is 80104604421.

It is not an unprimeable number, because it can be changed into a prime (12440640109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23073 + ... + 159416.

It is an arithmetic number, because the mean of its divisors is an integer number (357680400).

Almost surely, 2^12440640108 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12440640108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17168659200).

12440640108 is an abundant number, since it is smaller than the sum of its proper divisors (21896678292).

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

12440640108 is a wasteful number, since it uses less digits than its factorization.

12440640108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182551 (or 182549 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The spelling of 12440640108 in words is "twelve billion, four hundred forty million, six hundred forty thousand, one hundred eight".