12540636132 has 12 divisors (see below), whose sum is σ = 29261484336. Its totient is φ = 4180212040.

The previous prime is 12540636131. The next prime is 12540636167. The reversal of 12540636132 is 23163604521.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 12540636093 and 12540636102.

It is not an unprimeable number, because it can be changed into a prime (12540636131) 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, 522526494 + ... + 522526517.

It is an arithmetic number, because the mean of its divisors is an integer number (2438457028).

Almost surely, 2^12540636132 is an apocalyptic number.

12540636132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12540636132 is an abundant number, since it is smaller than the sum of its proper divisors (16720848204).

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

12540636132 is a wasteful number, since it uses less digits than its factorization.

12540636132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045053018 (or 1045053016 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 12540636132 in words is "twelve billion, five hundred forty million, six hundred thirty-six thousand, one hundred thirty-two".