6543454543 has 2 divisors, whose sum is σ = 6543454544. Its totient is φ = 6543454542.

The previous prime is 6543454439. The next prime is 6543454553. The reversal of 6543454543 is 3454543456.

It is a happy number.

6543454543 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6543454543 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 6543454543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6543454553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271727271 + 3271727272.

It is an arithmetic number, because the mean of its divisors is an integer number (3271727272).

Almost surely, 2^6543454543 is an apocalyptic number.

6543454543 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543454543 is an equidigital number, since it uses as much as digits as its factorization.

6543454543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728000, while the sum is 43.

The square root of 6543454543 is about 80891.6222052692. The cubic root of 6543454543 is about 1870.4051800104.

Adding to 6543454543 its reverse (3454543456), we get a palindrome (9997997999).

The spelling of 6543454543 in words is "six billion, five hundred forty-three million, four hundred fifty-four thousand, five hundred forty-three".