6565241957 has 4 divisors (see below), whose sum is σ = 6567992460. Its totient is φ = 6562491456.

The previous prime is 6565241929. The next prime is 6565241989. The reversal of 6565241957 is 7591425656.

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 890783716 + 5674458241 = 29846^2 + 75329^2 .

It is a cyclic number.

It is not a de Polignac number, because 6565241957 - 2⁸ = 6565241701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6565247957) 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, 1371668 + ... + 1376445.

It is an arithmetic number, because the mean of its divisors is an integer number (1641998115).

Almost surely, 2^6565241957 is an apocalyptic number.

It is an amenable number.

6565241957 is a deficient number, since it is larger than the sum of its proper divisors (2750503).

6565241957 is a wasteful number, since it uses less digits than its factorization.

6565241957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2750502.

The product of its digits is 2268000, while the sum is 50.

The square root of 6565241957 is about 81026.1806887132. The cubic root of 6565241957 is about 1872.4788118123.

The spelling of 6565241957 in words is "six billion, five hundred sixty-five million, two hundred forty-one thousand, nine hundred fifty-seven".