565639680 has 80 divisors (see below), whose sum is σ = 1808303904. Its totient is φ = 150835200.

The previous prime is 565639651. The next prime is 565639681. The reversal of 565639680 is 86936565.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (565639681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29146 + ... + 44505.

Almost surely, 2^565639680 is an apocalyptic number.

It is an amenable number.

565639680 is an abundant number, since it is smaller than the sum of its proper divisors (1242664224).

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

565639680 is an equidigital number, since it uses as much as digits as its factorization.

565639680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73677 (or 73661 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The square root of 565639680 is about 23783.1806115162. The cubic root of 565639680 is about 827.0148146252.

The spelling of 565639680 in words is "five hundred sixty-five million, six hundred thirty-nine thousand, six hundred eighty".