6543454009 has 2 divisors, whose sum is σ = 6543454010. Its totient is φ = 6543454008.

The previous prime is 6543453997. The next prime is 6543454097. The reversal of 6543454009 is 9004543456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4984783609 + 1558670400 = 70603^2 + 39480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6543454009 is a prime.

It is not a weakly prime, because it can be changed into another prime (6541454009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271727004 + 3271727005.

It is an arithmetic number, because the mean of its divisors is an integer number (3271727005).

Almost surely, 2^6543454009 is an apocalyptic number.

It is an amenable number.

6543454009 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543454009 is an equidigital number, since it uses as much as digits as its factorization.

6543454009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 40.

The square root of 6543454009 is about 80891.6189045565. The cubic root of 6543454009 is about 1870.4051291302.

The spelling of 6543454009 in words is "six billion, five hundred forty-three million, four hundred fifty-four thousand, nine".