12543703336889 has 2 divisors, whose sum is σ = 12543703336890. Its totient is φ = 12543703336888.

The previous prime is 12543703336861. The next prime is 12543703336921. The reversal of 12543703336889 is 98863330734521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12543249306025 + 454030864 = 3541645^2 + 21308^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12543703336889 is a prime.

It is not a weakly prime, because it can be changed into another prime (12543703366889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271851668444 + 6271851668445.

It is an arithmetic number, because the mean of its divisors is an integer number (6271851668445).

It is a 1-persistent number, because it is pandigital, but 2⋅12543703336889 = 25087406673778 is not.

Almost surely, 2^{12543703336889} is an apocalyptic number.

It is an amenable number.

12543703336889 is a deficient number, since it is larger than the sum of its proper divisors (1).

12543703336889 is an equidigital number, since it uses as much as digits as its factorization.

12543703336889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78382080, while the sum is 62.

The spelling of 12543703336889 in words is "twelve trillion, five hundred forty-three billion, seven hundred three million, three hundred thirty-six thousand, eight hundred eighty-nine".