12543135056 has 40 divisors (see below), whose sum is σ = 24630563424. Its totient is φ = 6187305600.

The previous prime is 12543134999. The next prime is 12543135067. The reversal of 12543135056 is 65053134521.

It is a super-2 number, since 2×12543135056² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443615 + ... + 471041.

Almost surely, 2^12543135056 is an apocalyptic number.

12543135056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12543135056 is a deficient number, since it is larger than the sum of its proper divisors (12087428368).

12543135056 is a wasteful number, since it uses less digits than its factorization.

12543135056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27819 (or 27813 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 35.

Adding to 12543135056 its reverse (65053134521), we get a palindrome (77596269577).

The spelling of 12543135056 in words is "twelve billion, five hundred forty-three million, one hundred thirty-five thousand, fifty-six".