6495808565 has 8 divisors (see below), whose sum is σ = 7922757048. Its totient is φ = 5111455680.

The previous prime is 6495808549. The next prime is 6495808601. The reversal of 6495808565 is 5658085946.

It can be written as a sum of positive squares in 4 ways, for example, as 51251281 + 6444557284 = 7159^2 + 80278^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6495808565 - 2⁴ = 6495808549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6495808565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10648562 + ... + 10649171.

It is an arithmetic number, because the mean of its divisors is an integer number (990344631).

Almost surely, 2^6495808565 is an apocalyptic number.

It is an amenable number.

6495808565 is a deficient number, since it is larger than the sum of its proper divisors (1426948483).

6495808565 is a wasteful number, since it uses less digits than its factorization.

6495808565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21297799.

The product of its (nonzero) digits is 10368000, while the sum is 56.

The square root of 6495808565 is about 80596.5791147490. The cubic root of 6495808565 is about 1865.8543491308.

The spelling of 6495808565 in words is "six billion, four hundred ninety-five million, eight hundred eight thousand, five hundred sixty-five".