565868520 has 192 divisors, whose sum is σ = 2110717440. Its totient is φ = 128793600.

The previous prime is 565868489. The next prime is 565868549. The reversal of 565868520 is 25868565.

565868520 is a `hidden beast` number, since 5 + 65 + 8 + 68 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 47 ways as a sum of consecutive naturals, for example, 1085860 + ... + 1086380.

It is an arithmetic number, because the mean of its divisors is an integer number (10993320).

Almost surely, 2^565868520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 565868520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1055358720).

565868520 is an abundant number, since it is smaller than the sum of its proper divisors (1544848920).

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

565868520 is a wasteful number, since it uses less digits than its factorization.

565868520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976 (or 969 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

The square root of 565868520 is about 23787.9910879418. The cubic root of 565868520 is about 827.1263276376.

Adding to 565868520 its sum of digits (45), we get a palindrome (565868565).

The spelling of 565868520 in words is "five hundred sixty-five million, eight hundred sixty-eight thousand, five hundred twenty".