6509922065 has 4 divisors (see below), whose sum is σ = 7811906484. Its totient is φ = 5207937648.

The previous prime is 6509922037. The next prime is 6509922071. The reversal of 6509922065 is 5602299056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3180170449 + 3329751616 = 56393^2 + 57704^2 .

It is a cyclic number.

It is not a de Polignac number, because 6509922065 - 2²⁰ = 6508873489 is a prime.

It is a Duffinian 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, 650992202 + ... + 650992211.

It is an arithmetic number, because the mean of its divisors is an integer number (1952976621).

Almost surely, 2^6509922065 is an apocalyptic number.

It is an amenable number.

6509922065 is a deficient number, since it is larger than the sum of its proper divisors (1301984419).

6509922065 is a wasteful number, since it uses less digits than its factorization.

6509922065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301984418.

The product of its (nonzero) digits is 291600, while the sum is 44.

The square root of 6509922065 is about 80684.0880533454. The cubic root of 6509922065 is about 1867.2046909825.

Adding to 6509922065 its reverse (5602299056), we get a palindrome (12112221121).

The spelling of 6509922065 in words is "six billion, five hundred nine million, nine hundred twenty-two thousand, sixty-five".