12540636112 has 20 divisors (see below), whose sum is σ = 25135327620. Its totient is φ = 6054099968.

The previous prime is 12540636089. The next prime is 12540636113. The reversal of 12540636112 is 21163604521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5993237056 + 6547399056 = 77416^2 + 80916^2 .

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 3 ways as a sum of consecutive naturals, for example, 13513153 + ... + 13514080.

It is an arithmetic number, because the mean of its divisors is an integer number (1256766381).

Almost surely, 2^12540636112 is an apocalyptic number.

It is an amenable number.

12540636112 is an abundant number, since it is smaller than the sum of its proper divisors (12594691508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12540636112 is a wasteful number, since it uses less digits than its factorization.

12540636112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27027270 (or 27027264 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 12540636112 in words is "twelve billion, five hundred forty million, six hundred thirty-six thousand, one hundred twelve".