12638875125078 has 64 divisors (see below), whose sum is σ = 29709009838080. Its totient is φ = 3974583691584.

The previous prime is 12638875125077. The next prime is 12638875125127. The reversal of 12638875125078 is 87052157883621.

12638875125078 is a `hidden beast` number, since 1 + 2 + 6 + 38 + 87 + 5 + 12 + 507 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12638875125077) 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, 69609526 + ... + 69790857.

It is an arithmetic number, because the mean of its divisors is an integer number (464203278720).

Almost surely, 2^{12638875125078} is an apocalyptic number.

12638875125078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12638875125078 is an abundant number, since it is smaller than the sum of its proper divisors (17070134713002).

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

12638875125078 is a wasteful number, since it uses less digits than its factorization.

12638875125078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139400490 (or 139400484 counting only the distinct ones).

The product of its (nonzero) digits is 45158400, while the sum is 63.

The spelling of 12638875125078 in words is "twelve trillion, six hundred thirty-eight billion, eight hundred seventy-five million, one hundred twenty-five thousand, seventy-eight".