12638603825 has 24 divisors (see below), whose sum is σ = 17065574400. Its totient is φ = 9248420160.

The previous prime is 12638603797. The next prime is 12638603827. The reversal of 12638603825 is 52830683621.

It is not a de Polignac number, because 12638603825 - 2²⁶ = 12571494961 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12638603827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 444977 + ... + 472526.

It is an arithmetic number, because the mean of its divisors is an integer number (711065600).

Almost surely, 2^12638603825 is an apocalyptic number.

It is an amenable number.

12638603825 is a deficient number, since it is larger than the sum of its proper divisors (4426970575).

12638603825 is a wasteful number, since it uses less digits than its factorization.

12638603825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917561 (or 917556 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 12638603825 in words is "twelve billion, six hundred thirty-eight million, six hundred three thousand, eight hundred twenty-five".