6565842541 has 4 divisors (see below), whose sum is σ = 6725985084. Its totient is φ = 6405700000.

The previous prime is 6565842523. The next prime is 6565842581. The reversal of 6565842541 is 1452485656.

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 656845641 + 5908996900 = 25629^2 + 76870^2 .

It is a cyclic number.

It is not a de Polignac number, because 6565842541 - 2¹¹ = 6565840493 is a prime.

It is a super-2 number, since 2×6565842541² = 86220576546410673362, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6565842491 and 6565842500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6565842581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80071210 + ... + 80071291.

It is an arithmetic number, because the mean of its divisors is an integer number (1681496271).

Almost surely, 2^6565842541 is an apocalyptic number.

It is an amenable number.

6565842541 is a deficient number, since it is larger than the sum of its proper divisors (160142543).

6565842541 is a wasteful number, since it uses less digits than its factorization.

6565842541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160142542.

The product of its digits is 1152000, while the sum is 46.

The square root of 6565842541 is about 81029.8867147178. The cubic root of 6565842541 is about 1872.5359077798.

The spelling of 6565842541 in words is "six billion, five hundred sixty-five million, eight hundred forty-two thousand, five hundred forty-one".