12638750138748 has 36 divisors (see below), whose sum is σ = 31950718607808. Its totient is φ = 4212551851200.

The previous prime is 12638750138743. The next prime is 12638750138767. The reversal of 12638750138748 is 84783105783621.

It is a happy number.

12638750138748 is a `hidden beast` number, since 1 + 2 + 6 + 3 + 8 + 7 + 501 + 3 + 87 + 48 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12638750138743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14780961 + ... + 15612632.

It is an arithmetic number, because the mean of its divisors is an integer number (887519961328).

Almost surely, 2^{12638750138748} is an apocalyptic number.

12638750138748 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12638750138748 is an abundant number, since it is smaller than the sum of its proper divisors (19311968469060).

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

12638750138748 is a wasteful number, since it uses less digits than its factorization.

12638750138748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30405154 (or 30405149 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 63.

The spelling of 12638750138748 in words is "twelve trillion, six hundred thirty-eight billion, seven hundred fifty million, one hundred thirty-eight thousand, seven hundred forty-eight".