564355665 has 12 divisors (see below), whose sum is σ = 978216564. Its totient is φ = 300989664.

The previous prime is 564355663. The next prime is 564355699. The reversal of 564355665 is 566553465.

564355665 is a `hidden beast` number, since 56 + 4 + 35 + 566 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 303177744 + 261177921 = 17412^2 + 16161^2 .

It is not a de Polignac number, because 564355665 - 2¹ = 564355663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 12541237 = 564355665 / (5 + 6 + 4 + 3 + 5 + 5 + 6 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 564355665.

It is not an unprimeable number, because it can be changed into a prime (564355661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6270574 + ... + 6270663.

It is an arithmetic number, because the mean of its divisors is an integer number (81518047).

Almost surely, 2^564355665 is an apocalyptic number.

It is an amenable number.

564355665 is a deficient number, since it is larger than the sum of its proper divisors (413860899).

564355665 is a wasteful number, since it uses less digits than its factorization.

564355665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12541248 (or 12541245 counting only the distinct ones).

The product of its digits is 1620000, while the sum is 45.

The square root of 564355665 is about 23756.1710930023. The cubic root of 564355665 is about 826.3885596720.

The spelling of 564355665 in words is "five hundred sixty-four million, three hundred fifty-five thousand, six hundred sixty-five".