12543564236 has 48 divisors (see below), whose sum is σ = 25391761920. Its totient is φ = 5310645120.

The previous prime is 12543564233. The next prime is 12543564247. The reversal of 12543564236 is 63246534521.

It is a junction number, because it is equal to n+sod(n) for n = 12543564193 and 12543564202.

It is not an unprimeable number, because it can be changed into a prime (12543564233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5010161 + ... + 5012663.

It is an arithmetic number, because the mean of its divisors is an integer number (528995040).

Almost surely, 2^12543564236 is an apocalyptic number.

It is an amenable number.

12543564236 is an abundant number, since it is smaller than the sum of its proper divisors (12848197684).

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

12543564236 is a wasteful number, since it uses less digits than its factorization.

12543564236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4614 (or 4612 counting only the distinct ones).

The product of its digits is 518400, while the sum is 41.

The spelling of 12543564236 in words is "twelve billion, five hundred forty-three million, five hundred sixty-four thousand, two hundred thirty-six".