565665006561 has 8 divisors (see below), whose sum is σ = 754999971264. Its totient is φ = 376720023120.

The previous prime is 565665006559. The next prime is 565665006617. The reversal of 565665006561 is 165600566565.

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

It is not a de Polignac number, because 565665006561 - 2¹ = 565665006559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (565665006661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97491930 + ... + 97497731.

It is an arithmetic number, because the mean of its divisors is an integer number (94374996408).

Almost surely, 2^565665006561 is an apocalyptic number.

It is an amenable number.

565665006561 is a deficient number, since it is larger than the sum of its proper divisors (189334964703).

565665006561 is a wasteful number, since it uses less digits than its factorization.

565665006561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194990631.

The product of its (nonzero) digits is 4860000, while the sum is 51.

The spelling of 565665006561 in words is "five hundred sixty-five billion, six hundred sixty-five million, six thousand, five hundred sixty-one".