655506565 has 24 divisors (see below), whose sum is σ = 937365912. Its totient is φ = 438520320.

The previous prime is 655506547. The next prime is 655506569. The reversal of 655506565 is 565605556.

It can be written as a sum of positive squares in 4 ways, for example, as 17994564 + 637512001 = 4242^2 + 25249^2 .

It is not a de Polignac number, because 655506565 - 2¹³ = 655498373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655506569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22584 + ... + 42673.

It is an arithmetic number, because the mean of its divisors is an integer number (39056913).

Almost surely, 2^655506565 is an apocalyptic number.

It is an amenable number.

655506565 is a deficient number, since it is larger than the sum of its proper divisors (281859347).

655506565 is a wasteful number, since it uses less digits than its factorization.

655506565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65317 (or 65310 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 43.

The square root of 655506565 is about 25602.8624376260. The cubic root of 655506565 is about 868.6783848631.

The spelling of 655506565 in words is "six hundred fifty-five million, five hundred six thousand, five hundred sixty-five".