12543216493 has 2 divisors, whose sum is σ = 12543216494. Its totient is φ = 12543216492.

The previous prime is 12543216481. The next prime is 12543216533. The reversal of 12543216493 is 39461234521.

It is an a-pointer prime, because the next prime (12543216533) can be obtained adding 12543216493 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9738137124 + 2805079369 = 98682^2 + 52963^2 .

It is a cyclic number.

It is not a de Polignac number, because 12543216493 - 2¹⁷ = 12543085421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12543216443) by changing a digit.

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 as a sum of consecutive naturals, namely, 6271608246 + 6271608247.

It is an arithmetic number, because the mean of its divisors is an integer number (6271608247).

Almost surely, 2^12543216493 is an apocalyptic number.

It is an amenable number.

12543216493 is a deficient number, since it is larger than the sum of its proper divisors (1).

12543216493 is an equidigital number, since it uses as much as digits as its factorization.

12543216493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 40.

The spelling of 12543216493 in words is "twelve billion, five hundred forty-three million, two hundred sixteen thousand, four hundred ninety-three".