6565155500 has 96 divisors (see below), whose sum is σ = 15341726400. Its totient is φ = 2446848000.

The previous prime is 6565155461. The next prime is 6565155511. The reversal of 6565155500 is 55515656.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 573836 + ... + 585164.

It is an arithmetic number, because the mean of its divisors is an integer number (159809650).

Almost surely, 2^6565155500 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 6565155500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7670863200).

6565155500 is an abundant number, since it is smaller than the sum of its proper divisors (8776570900).

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

6565155500 is a wasteful number, since it uses less digits than its factorization.

6565155500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11428 (or 11416 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 38.

The square root of 6565155500 is about 81025.6471742127. The cubic root of 6565155500 is about 1872.4705922822.

The spelling of 6565155500 in words is "six billion, five hundred sixty-five million, one hundred fifty-five thousand, five hundred".