12543703336961 has 16 divisors (see below), whose sum is σ = 12784291211328. Its totient is φ = 12305452737600.

The previous prime is 12543703336939. The next prime is 12543703337029. The reversal of 12543703336961 is 16963330734521.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12543703336961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12543703336921) 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, 9298610 + ... + 10561796.

It is an arithmetic number, because the mean of its divisors is an integer number (799018200708).

Almost surely, 2^{12543703336961} is an apocalyptic number.

It is an amenable number.

12543703336961 is a deficient number, since it is larger than the sum of its proper divisors (240587874367).

12543703336961 is a wasteful number, since it uses less digits than its factorization.

12543703336961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264112.

The product of its (nonzero) digits is 7348320, while the sum is 53.

The spelling of 12543703336961 in words is "twelve trillion, five hundred forty-three billion, seven hundred three million, three hundred thirty-six thousand, nine hundred sixty-one".