12540636111 has 8 divisors (see below), whose sum is σ = 16794509184. Its totient is φ = 8323593560.

The previous prime is 12540636089. The next prime is 12540636113. The reversal of 12540636111 is 11163604521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12540636111 - 2⁵ = 12540636079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12540636113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9206835 + ... + 9208196.

It is an arithmetic number, because the mean of its divisors is an integer number (2099313648).

Almost surely, 2^12540636111 is an apocalyptic number.

12540636111 is a deficient number, since it is larger than the sum of its proper divisors (4253873073).

12540636111 is a wasteful number, since it uses less digits than its factorization.

12540636111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18415261.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 12540636111 in words is "twelve billion, five hundred forty million, six hundred thirty-six thousand, one hundred eleven".