12638875125126 has 64 divisors (see below), whose sum is σ = 27712189739520. Its totient is φ = 3828657611520.

The previous prime is 12638875125077. The next prime is 12638875125127. The reversal of 12638875125126 is 62152157883621.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12638875125127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20802031 + ... + 21400986.

It is an arithmetic number, because the mean of its divisors is an integer number (433002964680).

Almost surely, 2^{12638875125126} is an apocalyptic number.

12638875125126 is an abundant number, since it is smaller than the sum of its proper divisors (15073314614394).

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

12638875125126 is a wasteful number, since it uses less digits than its factorization.

12638875125126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42203149.

The product of its digits is 9676800, while the sum is 57.

The spelling of 12638875125126 in words is "twelve trillion, six hundred thirty-eight billion, eight hundred seventy-five million, one hundred twenty-five thousand, one hundred twenty-six".