12638750140 has 48 divisors (see below), whose sum is σ = 26997596640. Its totient is φ = 4969324800.

The previous prime is 12638750129. The next prime is 12638750143. The reversal of 12638750140 is 4105783621.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 12638750140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12638750143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258274 + ... + 303286.

It is an arithmetic number, because the mean of its divisors is an integer number (562449930).

Almost surely, 2^12638750140 is an apocalyptic number.

12638750140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12638750140 is an abundant number, since it is smaller than the sum of its proper divisors (14358846500).

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

12638750140 is a wasteful number, since it uses less digits than its factorization.

12638750140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45262 (or 45260 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 12638750140 in words is "twelve billion, six hundred thirty-eight million, seven hundred fifty thousand, one hundred forty".