12689339791543 has 2 divisors, whose sum is σ = 12689339791544. Its totient is φ = 12689339791542.

The previous prime is 12689339791489. The next prime is 12689339791549. The reversal of 12689339791543 is 34519793398621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12689339791543 - 2¹⁷ = 12689339660471 is a prime.

It is a super-2 number, since 2×12689339791543² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12689339791549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6344669895771 + 6344669895772.

It is an arithmetic number, because the mean of its divisors is an integer number (6344669895772).

Almost surely, 2^{12689339791543} is an apocalyptic number.

12689339791543 is a deficient number, since it is larger than the sum of its proper divisors (1).

12689339791543 is an equidigital number, since it uses as much as digits as its factorization.

12689339791543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 264539520, while the sum is 70.

The spelling of 12689339791543 in words is "twelve trillion, six hundred eighty-nine billion, three hundred thirty-nine million, seven hundred ninety-one thousand, five hundred forty-three".