6546864809 has 2 divisors, whose sum is σ = 6546864810. Its totient is φ = 6546864808.

The previous prime is 6546864791. The next prime is 6546864817. The reversal of 6546864809 is 9084686456.

6546864809 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5848425625 + 698439184 = 76475^2 + 26428^2 .

It is a cyclic number.

It is not a de Polignac number, because 6546864809 - 2³² = 2251897513 is a prime.

It is a super-2 number, since 2×6546864809² = 85722877654645212962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6546864829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3273432404 + 3273432405.

It is an arithmetic number, because the mean of its divisors is an integer number (3273432405).

Almost surely, 2^6546864809 is an apocalyptic number.

It is an amenable number.

6546864809 is a deficient number, since it is larger than the sum of its proper divisors (1).

6546864809 is an equidigital number, since it uses as much as digits as its factorization.

6546864809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9953280, while the sum is 56.

The square root of 6546864809 is about 80912.6986881540. The cubic root of 6546864809 is about 1870.7300579149.

The spelling of 6546864809 in words is "six billion, five hundred forty-six million, eight hundred sixty-four thousand, eight hundred nine".