6543454439 has 2 divisors, whose sum is σ = 6543454440. Its totient is φ = 6543454438.

The previous prime is 6543454427. The next prime is 6543454543. The reversal of 6543454439 is 9344543456.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6543454439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6543454393 and 6543454402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6543454339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271727219 + 3271727220.

It is an arithmetic number, because the mean of its divisors is an integer number (3271727220).

Almost surely, 2^6543454439 is an apocalyptic number.

6543454439 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543454439 is an equidigital number, since it uses as much as digits as its factorization.

6543454439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3110400, while the sum is 47.

The square root of 6543454439 is about 80891.6215624338. The cubic root of 6543454439 is about 1870.4051701011.

The spelling of 6543454439 in words is "six billion, five hundred forty-three million, four hundred fifty-four thousand, four hundred thirty-nine".