6565488720 has 80 divisors (see below), whose sum is σ = 23260594560. Its totient is φ = 1500682752.

The previous prime is 6565488719. The next prime is 6565488749. The reversal of 6565488720 is 278845656.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1952335 + ... + 1955694.

It is an arithmetic number, because the mean of its divisors is an integer number (290757432).

Almost surely, 2^6565488720 is an apocalyptic number.

6565488720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6565488720 is an abundant number, since it is smaller than the sum of its proper divisors (16695105840).

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

6565488720 is a wasteful number, since it uses less digits than its factorization.

6565488720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3908052 (or 3908046 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 51.

The square root of 6565488720 is about 81027.7034106237. The cubic root of 6565488720 is about 1872.5022713539.

The spelling of 6565488720 in words is "six billion, five hundred sixty-five million, four hundred eighty-eight thousand, seven hundred twenty".