565645645 has 4 divisors (see below), whose sum is σ = 678774780. Its totient is φ = 452516512.

The previous prime is 565645643. The next prime is 565645649. The reversal of 565645645 is 546546565.

565645645 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546546565 = 5 ⋅109309313.

It can be written as a sum of positive squares in 2 ways, for example, as 413024329 + 152621316 = 20323^2 + 12354^2 .

It is a cyclic number.

It is not a de Polignac number, because 565645645 - 2¹ = 565645643 is a prime.

It is a super-3 number, since 3×565645645³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 565645595 and 565645604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565645643) 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, 56564560 + ... + 56564569.

It is an arithmetic number, because the mean of its divisors is an integer number (169693695).

Almost surely, 2^565645645 is an apocalyptic number.

It is an amenable number.

565645645 is a deficient number, since it is larger than the sum of its proper divisors (113129135).

565645645 is a wasteful number, since it uses less digits than its factorization.

565645645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113129134.

The product of its digits is 2160000, while the sum is 46.

The square root of 565645645 is about 23783.3060149341. The cubic root of 565645645 is about 827.0177217327.

The spelling of 565645645 in words is "five hundred sixty-five million, six hundred forty-five thousand, six hundred forty-five".