12646236525 has 24 divisors (see below), whose sum is σ = 22516788000. Its totient is φ = 6225839040.

The previous prime is 12646236481. The next prime is 12646236553. The reversal of 12646236525 is 52563264621.

12646236525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12646236525 - 2¹³ = 12646228333 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 6484275 + ... + 6486224.

It is an arithmetic number, because the mean of its divisors is an integer number (938199500).

Almost surely, 2^12646236525 is an apocalyptic number.

12646236525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12646236525 is a deficient number, since it is larger than the sum of its proper divisors (9870551475).

12646236525 is a wasteful number, since it uses less digits than its factorization.

12646236525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12970525 (or 12970520 counting only the distinct ones).

The product of its digits is 518400, while the sum is 42.

The spelling of 12646236525 in words is "twelve billion, six hundred forty-six million, two hundred thirty-six thousand, five hundred twenty-five".