12638887635 has 16 divisors (see below), whose sum is σ = 22060604160. Its totient is φ = 6127945440.

The previous prime is 12638887603. The next prime is 12638887663. The reversal of 12638887635 is 53678883621.

It is not a de Polignac number, because 12638887635 - 2⁵ = 12638887603 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38299495 + ... + 38299824.

It is an arithmetic number, because the mean of its divisors is an integer number (1378787760).

Almost surely, 2^12638887635 is an apocalyptic number.

12638887635 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12638887635 is a deficient number, since it is larger than the sum of its proper divisors (9421716525).

12638887635 is a wasteful number, since it uses less digits than its factorization.

12638887635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76599338.

The product of its digits is 11612160, while the sum is 57.

The spelling of 12638887635 in words is "twelve billion, six hundred thirty-eight million, eight hundred eighty-seven thousand, six hundred thirty-five".