565215660 has 72 divisors (see below), whose sum is σ = 1815349536. Its totient is φ = 141857280.

The previous prime is 565215619. The next prime is 565215661. The reversal of 565215660 is 66512565.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (565215661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89296 + ... + 95415.

It is an arithmetic number, because the mean of its divisors is an integer number (25213188).

Almost surely, 2^565215660 is an apocalyptic number.

It is an amenable number.

565215660 is an abundant number, since it is smaller than the sum of its proper divisors (1250133876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

565215660 is a wasteful number, since it uses less digits than its factorization.

565215660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184743 (or 184738 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 565215660 is about 23774.2646573979. The cubic root of 565215660 is about 826.8081114919.

It can be divided in two parts, 5652 and 15660, that added together give a palindrome (21312).

The spelling of 565215660 in words is "five hundred sixty-five million, two hundred fifteen thousand, six hundred sixty".