565540806 has 16 divisors (see below), whose sum is σ = 1137621744. Its totient is φ = 187423584.

The previous prime is 565540777. The next prime is 565540817. The reversal of 565540806 is 608045565.

It is a super-2 number, since 2×565540806² = 639672806502259272, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 271381 + ... + 273456.

It is an arithmetic number, because the mean of its divisors is an integer number (71101359).

Almost surely, 2^565540806 is an apocalyptic number.

565540806 is an abundant number, since it is smaller than the sum of its proper divisors (572080938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

565540806 is a wasteful number, since it uses less digits than its factorization.

565540806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545015.

The product of its (nonzero) digits is 144000, while the sum is 39.

The square root of 565540806 is about 23781.1018668185. The cubic root of 565540806 is about 826.9666243311.

The spelling of 565540806 in words is "five hundred sixty-five million, five hundred forty thousand, eight hundred six".