12394538525 has 6 divisors (see below), whose sum is σ = 15369227802. Its totient is φ = 9915630800.

The previous prime is 12394538521. The next prime is 12394538537. The reversal of 12394538525 is 52583549321.

It is a happy number.

12394538525 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 3 ways, for example, as 1306027321 + 11088511204 = 36139^2 + 105302^2 .

It is not a de Polignac number, because 12394538525 - 2² = 12394538521 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 12394538525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12394538521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 247890746 + ... + 247890795.

It is an arithmetic number, because the mean of its divisors is an integer number (2561537967).

Almost surely, 2^12394538525 is an apocalyptic number.

It is an amenable number.

12394538525 is a deficient number, since it is larger than the sum of its proper divisors (2974689277).

12394538525 is an equidigital number, since it uses as much as digits as its factorization.

12394538525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495781551 (or 495781546 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 47.

The spelling of 12394538525 in words is "twelve billion, three hundred ninety-four million, five hundred thirty-eight thousand, five hundred twenty-five".