12500001388889 has 24 divisors (see below), whose sum is σ = 14721409188936. Its totient is φ = 10581748800000.

The previous prime is 12500001388883. The next prime is 12500001388943. The reversal of 12500001388889 is 98888310000521.

12500001388889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9539079331600 + 2960922057289 = 3088540^2 + 1720733^2 .

It is not a de Polignac number, because 12500001388889 - 2⁴⁰ = 11400489761113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12500001388889.

It is not an unprimeable number, because it can be changed into a prime (12500001388883) 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, 1164782 + ... + 5133879.

It is an arithmetic number, because the mean of its divisors is an integer number (613392049539).

Almost surely, 2^{12500001388889} is an apocalyptic number.

It is an amenable number.

12500001388889 is a deficient number, since it is larger than the sum of its proper divisors (2221407800047).

12500001388889 is a wasteful number, since it uses less digits than its factorization.

12500001388889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6299177 (or 6299170 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 53.

The spelling of 12500001388889 in words is "twelve trillion, five hundred billion, one million, three hundred eighty-eight thousand, eight hundred eighty-nine".