12543789996 has 18 divisors (see below), whose sum is σ = 31707913692. Its totient is φ = 4181263320.

The previous prime is 12543789943. The next prime is 12543790001. The reversal of 12543789996 is 69998734521.

12543789996 is a `hidden beast` number, since 1 + 2 + 543 + 7 + 89 + 9 + 9 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 174219270 + ... + 174219341.

Almost surely, 2^12543789996 is an apocalyptic number.

It is an amenable number.

12543789996 is an abundant number, since it is smaller than the sum of its proper divisors (19164123696).

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

12543789996 is a wasteful number, since it uses less digits than its factorization.

12543789996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348438621 (or 348438616 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The spelling of 12543789996 in words is "twelve billion, five hundred forty-three million, seven hundred eighty-nine thousand, nine hundred ninety-six".