12638750000 has 80 divisors (see below), whose sum is σ = 30612421632. Its totient is φ = 5055000000.

The previous prime is 12638749999. The next prime is 12638750021. The reversal of 12638750000 is 5783621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1244945 + ... + 1255055.

Almost surely, 2^12638750000 is an apocalyptic number.

12638750000 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 12638750000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15306210816).

12638750000 is an abundant number, since it is smaller than the sum of its proper divisors (17973671632).

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

12638750000 is an frugal number, since it uses more digits than its factorization.

12638750000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10154 (or 10118 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 12638750000 in words is "twelve billion, six hundred thirty-eight million, seven hundred fifty thousand".