6565640135 has 4 divisors (see below), whose sum is σ = 7878768168. Its totient is φ = 5252512104.

The previous prime is 6565640131. The next prime is 6565640153. The reversal of 6565640135 is 5310465656.

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

It is a cyclic number.

It is not a de Polignac number, because 6565640135 - 2² = 6565640131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6565640092 and 6565640101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6565640131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656564009 + ... + 656564018.

It is an arithmetic number, because the mean of its divisors is an integer number (1969692042).

Almost surely, 2^6565640135 is an apocalyptic number.

6565640135 is a deficient number, since it is larger than the sum of its proper divisors (1313128033).

6565640135 is a wasteful number, since it uses less digits than its factorization.

6565640135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313128032.

The product of its (nonzero) digits is 324000, while the sum is 41.

The square root of 6565640135 is about 81028.6377461697. The cubic root of 6565640135 is about 1872.5166659539.

The spelling of 6565640135 in words is "six billion, five hundred sixty-five million, six hundred forty thousand, one hundred thirty-five".