13545643543 has 2 divisors, whose sum is σ = 13545643544. Its totient is φ = 13545643542.

The previous prime is 13545643541. The next prime is 13545643577. The reversal of 13545643543 is 34534654531.

13545643543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13545643543 - 2¹ = 13545643541 is a prime.

Together with 13545643541, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 13545643543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13545643541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6772821771 + 6772821772.

It is an arithmetic number, because the mean of its divisors is an integer number (6772821772).

Almost surely, 2^13545643543 is an apocalyptic number.

13545643543 is a deficient number, since it is larger than the sum of its proper divisors (1).

13545643543 is an equidigital number, since it uses as much as digits as its factorization.

13545643543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296000, while the sum is 43.

The spelling of 13545643543 in words is "thirteen billion, five hundred forty-five million, six hundred forty-three thousand, five hundred forty-three".