12540636115 has 32 divisors (see below), whose sum is σ = 17581639680. Its totient is φ = 8408125824.

The previous prime is 12540636113. The next prime is 12540636131. The reversal of 12540636115 is 51163604521.

It is not a de Polignac number, because 12540636115 - 2¹ = 12540636113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12540636113) 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 31 ways as a sum of consecutive naturals, for example, 2018604 + ... + 2024806.

It is an arithmetic number, because the mean of its divisors is an integer number (549426240).

Almost surely, 2^12540636115 is an apocalyptic number.

12540636115 is a deficient number, since it is larger than the sum of its proper divisors (5041003565).

12540636115 is a wasteful number, since it uses less digits than its factorization.

12540636115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7491.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 12540636115 in words is "twelve billion, five hundred forty million, six hundred thirty-six thousand, one hundred fifteen".