6543465728 has 36 divisors (see below), whose sum is σ = 13075564068. Its totient is φ = 3268177920.

The previous prime is 6543465683. The next prime is 6543465749. The reversal of 6543465728 is 8275643456.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4341228544 + 2202237184 = 65888^2 + 46928^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230558 + ... + 257378.

It is an arithmetic number, because the mean of its divisors is an integer number (363210113).

Almost surely, 2^6543465728 is an apocalyptic number.

It is an amenable number.

6543465728 is a deficient number, since it is larger than the sum of its proper divisors (6532098340).

6543465728 is an equidigital number, since it uses as much as digits as its factorization.

6543465728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27790 (or 27776 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 50.

The square root of 6543465728 is about 80891.6913409529. The cubic root of 6543465728 is about 1870.4062457303.

The spelling of 6543465728 in words is "six billion, five hundred forty-three million, four hundred sixty-five thousand, seven hundred twenty-eight".