6565800000 has 336 divisors, whose sum is σ = 22477561344. Its totient is φ = 1689600000.

The previous prime is 6565799987. The next prime is 6565800011. The reversal of 6565800000 is 85656.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18599824 + ... + 18600176.

It is an arithmetic number, because the mean of its divisors is an integer number (66897504).

Almost surely, 2^6565800000 is an apocalyptic number.

6565800000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6565800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11238780672).

6565800000 is an abundant number, since it is smaller than the sum of its proper divisors (15911761344).

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

6565800000 is an equidigital number, since it uses as much as digits as its factorization.

6565800000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 6565800000 is about 81029.6242123830. The cubic root of 6565800000 is about 1872.5318636315.

Adding to 6565800000 its reverse (85656), we get a palindrome (6565885656).

The spelling of 6565800000 in words is "six billion, five hundred sixty-five million, eight hundred thousand".