564447385 has 4 divisors (see below), whose sum is σ = 677336868. Its totient is φ = 451557904.

The previous prime is 564447371. The next prime is 564447391. The reversal of 564447385 is 583744465.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 297321049 + 267126336 = 17243^2 + 16344^2 .

It is a cyclic number.

It is not a de Polignac number, because 564447385 - 2¹¹ = 564445337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56444734 + ... + 56444743.

It is an arithmetic number, because the mean of its divisors is an integer number (169334217).

Almost surely, 2^564447385 is an apocalyptic number.

It is an amenable number.

564447385 is a deficient number, since it is larger than the sum of its proper divisors (112889483).

564447385 is a wasteful number, since it uses less digits than its factorization.

564447385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112889482.

The product of its digits is 1612800, while the sum is 46.

The square root of 564447385 is about 23758.1014603440. The cubic root of 564447385 is about 826.4333259176.

The spelling of 564447385 in words is "five hundred sixty-four million, four hundred forty-seven thousand, three hundred eighty-five".