12638628508 has 24 divisors (see below), whose sum is σ = 24131931264. Its totient is φ = 5743964400.

The previous prime is 12638628503. The next prime is 12638628523. The reversal of 12638628508 is 80582683621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12638628503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341763 + ... + 376933.

It is an arithmetic number, because the mean of its divisors is an integer number (1005497136).

Almost surely, 2^12638628508 is an apocalyptic number.

It is an amenable number.

12638628508 is a deficient number, since it is larger than the sum of its proper divisors (11493302756).

12638628508 is a wasteful number, since it uses less digits than its factorization.

12638628508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43353 (or 43351 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 49.

It can be divided in two parts, 12638 and 628508, that added together give a palindrome (641146).

The spelling of 12638628508 in words is "twelve billion, six hundred thirty-eight million, six hundred twenty-eight thousand, five hundred eight".