12640670304 has 96 divisors (see below), whose sum is σ = 33939440640. Its totient is φ = 4117619712.

The previous prime is 12640670279. The next prime is 12640670309. The reversal of 12640670304 is 40307604621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640670309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3648477 + ... + 3651939.

It is an arithmetic number, because the mean of its divisors is an integer number (353535840).

Almost surely, 2^12640670304 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 12640670304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16969720320).

12640670304 is an abundant number, since it is smaller than the sum of its proper divisors (21298770336).

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

12640670304 is a wasteful number, since it uses less digits than its factorization.

12640670304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4332 (or 4324 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The spelling of 12640670304 in words is "twelve billion, six hundred forty million, six hundred seventy thousand, three hundred four".