12638893480 has 32 divisors (see below), whose sum is σ = 29934223200. Its totient is φ = 4789475136.

The previous prime is 12638893453. The next prime is 12638893481. The reversal of 12638893480 is 8439883621.

12638893480 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12638893481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8314302 + ... + 8315821.

It is an arithmetic number, because the mean of its divisors is an integer number (935444475).

Almost surely, 2^12638893480 is an apocalyptic number.

12638893480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12638893480 is an abundant number, since it is smaller than the sum of its proper divisors (17295329720).

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

12638893480 is a wasteful number, since it uses less digits than its factorization.

12638893480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16630153 (or 16630149 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 12638893480 in words is "twelve billion, six hundred thirty-eight million, eight hundred ninety-three thousand, four hundred eighty".