6565616016 has 80 divisors (see below), whose sum is σ = 17425134720. Its totient is φ = 2128983040.

The previous prime is 6565615967. The next prime is 6565616033. The reversal of 6565616016 is 6106165656.

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, 701866 + ... + 711158.

It is an arithmetic number, because the mean of its divisors is an integer number (217814184).

Almost surely, 2^6565616016 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 6565616016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8712567360).

6565616016 is an abundant number, since it is smaller than the sum of its proper divisors (10859518704).

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

6565616016 is a wasteful number, since it uses less digits than its factorization.

6565616016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9704 (or 9698 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 6565616016 is about 81028.4889159362. The cubic root of 6565616016 is about 1872.5143730429.

The spelling of 6565616016 in words is "six billion, five hundred sixty-five million, six hundred sixteen thousand, sixteen".