12638888751250 has 40 divisors (see below), whose sum is σ = 24454537443072. Its totient is φ = 4892473050000.

The previous prime is 12638888751197. The next prime is 12638888751253. The reversal of 12638888751250 is 5215788883621.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12638888751253) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 163043686 + ... + 163121185.

Almost surely, 2^{12638888751250} is an apocalyptic number.

12638888751250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12638888751250 is a deficient number, since it is larger than the sum of its proper divisors (11815648691822).

12638888751250 is an equidigital number, since it uses as much as digits as its factorization.

12638888751250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326164924 (or 326164909 counting only the distinct ones).

The product of its (nonzero) digits is 51609600, while the sum is 64.

The spelling of 12638888751250 in words is "twelve trillion, six hundred thirty-eight billion, eight hundred eighty-eight million, seven hundred fifty-one thousand, two hundred fifty".