564660641 has 4 divisors (see below), whose sum is σ = 564844800.
Its totient is φ = 564476484.
The previous prime is 564660631. The next prime is 564660727. The reversal of 564660641 is 146066465.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is not a de Polignac number, because 564660641 - 214 = 564644257 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 564660595 and 564660604.
It is not an unprimeable number, because it can be changed into a prime (564660631) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87401 + ... + 93638.
It is an arithmetic number, because the mean of its divisors is an integer number (141211200).
Almost surely, 2564660641 is an apocalyptic number.
It is an amenable number.
564660641 is a deficient number, since it is larger than the sum of its proper divisors (184159).
564660641 is a wasteful number, since it uses less digits than its factorization.
564660641 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 184158.
The product of its (nonzero) digits is 103680, while the sum is 38.
The square root of 564660641 is about 23762.5891055668.
The cubic root of 564660641 is about 826.5373921123.
The spelling of 564660641 in words is "five hundred sixty-four million, six hundred sixty thousand, six hundred forty-one".