12638125637575 has 12 divisors (see below), whose sum is σ = 15673603531768. Its totient is φ = 10108998741600.

The previous prime is 12638125637569. The next prime is 12638125637581. The reversal of 12638125637575 is 57573652183621.

It is an interprime number because it is at equal distance from previous prime (12638125637569) and next prime (12638125637581).

It is not a de Polignac number, because 12638125637575 - 2¹⁵ = 12638125604807 is a prime.

It is a super-2 number, since 2×12638125637575² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37372521 + ... + 37709170.

Almost surely, 2^{12638125637575} is an apocalyptic number.

12638125637575 is a deficient number, since it is larger than the sum of its proper divisors (3035477894193).

12638125637575 is an equidigital number, since it uses as much as digits as its factorization.

12638125637575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75088434 (or 75088429 counting only the distinct ones).

The product of its digits is 63504000, while the sum is 61.

The spelling of 12638125637575 in words is "twelve trillion, six hundred thirty-eight billion, one hundred twenty-five million, six hundred thirty-seven thousand, five hundred seventy-five".