12543005100 has 72 divisors (see below), whose sum is σ = 36375671808. Its totient is φ = 3337006400.

The previous prime is 12543005089. The next prime is 12543005141. The reversal of 12543005100 is 150034521.

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 23 ways as a sum of consecutive naturals, for example, 80797 + ... + 177803.

It is an arithmetic number, because the mean of its divisors is an integer number (505217664).

Almost surely, 2^12543005100 is an apocalyptic number.

12543005100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12543005100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18187835904).

12543005100 is an abundant number, since it is smaller than the sum of its proper divisors (23832666708).

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

12543005100 is a wasteful number, since it uses less digits than its factorization.

12543005100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97455 (or 97448 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 12543005100 its reverse (150034521), we get a palindrome (12693039621).

The spelling of 12543005100 in words is "twelve billion, five hundred forty-three million, five thousand, one hundred".