564340561 has 4 divisors (see below), whose sum is σ = 566266932. Its totient is φ = 562414192.

The previous prime is 564340547. The next prime is 564340573. The reversal of 564340561 is 165043465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165043465 = 5 ⋅33008693.

It can be written as a sum of positive squares in 2 ways, for example, as 496442961 + 67897600 = 22281^2 + 8240^2 .

It is a cyclic number.

It is not a de Polignac number, because 564340561 - 2⁷ = 564340433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (564340541) 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 3 ways as a sum of consecutive naturals, for example, 962746 + ... + 963331.

It is an arithmetic number, because the mean of its divisors is an integer number (141566733).

Almost surely, 2^564340561 is an apocalyptic number.

It is an amenable number.

564340561 is a deficient number, since it is larger than the sum of its proper divisors (1926371).

564340561 is a wasteful number, since it uses less digits than its factorization.

564340561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926370.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 564340561 is about 23755.8531945287. The cubic root of 564340561 is about 826.3811873210.

The spelling of 564340561 in words is "five hundred sixty-four million, three hundred forty thousand, five hundred sixty-one".