565641020 has 96 divisors (see below), whose sum is σ = 1435499520. Its totient is φ = 182891520.

The previous prime is 565641019. The next prime is 565641031. The reversal of 565641020 is 20146565.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 896105 + ... + 896735.

It is an arithmetic number, because the mean of its divisors is an integer number (14953120).

Almost surely, 2^565641020 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 565641020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (717749760).

565641020 is an abundant number, since it is smaller than the sum of its proper divisors (869858500).

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

565641020 is a wasteful number, since it uses less digits than its factorization.

565641020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003 (or 1001 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 565641020 is about 23783.2087826685. The cubic root of 565641020 is about 827.0154676906.

Adding to 565641020 its reverse (20146565), we get a palindrome (585787585).

The spelling of 565641020 in words is "five hundred sixty-five million, six hundred forty-one thousand, twenty".