6565332840 has 128 divisors (see below), whose sum is σ = 21506083200. Its totient is φ = 1590149120.

The previous prime is 6565332797. The next prime is 6565332847. The reversal of 6565332840 is 482335656.

It is a junction number, because it is equal to n+sod(n) for n = 6565332792 and 6565332801.

It is not an unprimeable number, because it can be changed into a prime (6565332847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2492164 + ... + 2494796.

It is an arithmetic number, because the mean of its divisors is an integer number (168016275).

Almost surely, 2^6565332840 is an apocalyptic number.

6565332840 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 6565332840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10753041600).

6565332840 is an abundant number, since it is smaller than the sum of its proper divisors (14940750360).

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

6565332840 is a wasteful number, since it uses less digits than its factorization.

6565332840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4547 (or 4543 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

The square root of 6565332840 is about 81026.7415116763. The cubic root of 6565332840 is about 1872.4874520476.

The spelling of 6565332840 in words is "six billion, five hundred sixty-five million, three hundred thirty-two thousand, eight hundred forty".