12704740640 has 96 divisors (see below), whose sum is σ = 31699926720. Its totient is φ = 4798393344.

The previous prime is 12704740619. The next prime is 12704740649. The reversal of 12704740640 is 4604740721.

It is a super-2 number, since 2×12704740640² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12704740640.

It is not an unprimeable number, because it can be changed into a prime (12704740649) 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, 926474 + ... + 940086.

It is an arithmetic number, because the mean of its divisors is an integer number (330207570).

Almost surely, 2^12704740640 is an apocalyptic number.

12704740640 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 12704740640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15849963360).

12704740640 is an abundant number, since it is smaller than the sum of its proper divisors (18995186080).

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

12704740640 is a wasteful number, since it uses less digits than its factorization.

12704740640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13954 (or 13946 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The spelling of 12704740640 in words is "twelve billion, seven hundred four million, seven hundred forty thousand, six hundred forty".