6561752112 has 80 divisors (see below), whose sum is σ = 18959580160. Its totient is φ = 2172744000.

The previous prime is 6561752069. The next prime is 6561752117. The reversal of 6561752112 is 2112571656.

6561752112 is a `hidden beast` number, since 6 + 5 + 617 + 5 + 21 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (6561752117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14937 + ... + 115527.

It is an arithmetic number, because the mean of its divisors is an integer number (236994752).

Almost surely, 2^6561752112 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 6561752112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9479790080).

6561752112 is an abundant number, since it is smaller than the sum of its proper divisors (12397828048).

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

6561752112 is a wasteful number, since it uses less digits than its factorization.

6561752112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100759 (or 100747 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 6561752112 is about 81004.6425336227. The cubic root of 6561752112 is about 1872.1469723529.

The spelling of 6561752112 in words is "six billion, five hundred sixty-one million, seven hundred fifty-two thousand, one hundred twelve".