12738689280 has 216 divisors, whose sum is σ = 44426683392. Its totient is φ = 3369848832.

The previous prime is 12738689269. The next prime is 12738689309. The reversal of 12738689280 is 8298683721.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1458687 + ... + 1467393.

Almost surely, 2^12738689280 is an apocalyptic number.

12738689280 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 12738689280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22213341696).

12738689280 is an abundant number, since it is smaller than the sum of its proper divisors (31687994112).

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

12738689280 is a wasteful number, since it uses less digits than its factorization.

12738689280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8861 (or 8844 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 12738689280 in words is "twelve billion, seven hundred thirty-eight million, six hundred eighty-nine thousand, two hundred eighty".