564646645 has 4 divisors (see below), whose sum is σ = 677575980. Its totient is φ = 451717312.

The previous prime is 564646639. The next prime is 564646651. The reversal of 564646645 is 546646465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546646465 = 5 ⋅109329293.

It is an interprime number because it is at equal distance from previous prime (564646639) and next prime (564646651).

It can be written as a sum of positive squares in 2 ways, for example, as 124947684 + 439698961 = 11178^2 + 20969^2 .

It is a cyclic number.

It is not a de Polignac number, because 564646645 - 2²⁹ = 27775733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 564646595 and 564646604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56464660 + ... + 56464669.

It is an arithmetic number, because the mean of its divisors is an integer number (169393995).

Almost surely, 2^564646645 is an apocalyptic number.

It is an amenable number.

564646645 is a deficient number, since it is larger than the sum of its proper divisors (112929335).

564646645 is a wasteful number, since it uses less digits than its factorization.

564646645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112929334.

The product of its digits is 2073600, while the sum is 46.

The square root of 564646645 is about 23762.2946072133. The cubic root of 564646645 is about 826.5305630472.

The spelling of 564646645 in words is "five hundred sixty-four million, six hundred forty-six thousand, six hundred forty-five".