12540636025 has 48 divisors (see below), whose sum is σ = 16984627200. Its totient is φ = 9148930560.

The previous prime is 12540636023. The next prime is 12540636037. The reversal of 12540636025 is 52063604521.

It is not a de Polignac number, because 12540636025 - 2¹ = 12540636023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12540636023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5274637 + ... + 5277013.

It is an arithmetic number, because the mean of its divisors is an integer number (353846400).

Almost surely, 2^12540636025 is an apocalyptic number.

It is an amenable number.

12540636025 is a deficient number, since it is larger than the sum of its proper divisors (4443991175).

12540636025 is a wasteful number, since it uses less digits than its factorization.

12540636025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818 (or 2813 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 12540636025 in words is "twelve billion, five hundred forty million, six hundred thirty-six thousand, twenty-five".