6564757752 has 144 divisors (see below), whose sum is σ = 21448659960. Its totient is φ = 1875617856.

The previous prime is 6564757733. The next prime is 6564757781. The reversal of 6564757752 is 2577574656.

6564757752 is a `hidden beast` number, since 6 + 5 + 64 + 7 + 577 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 60798 + ... + 129714.

Almost surely, 2^6564757752 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 6564757752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10724329980).

6564757752 is an abundant number, since it is smaller than the sum of its proper divisors (14883902208).

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

6564757752 is a wasteful number, since it uses less digits than its factorization.

6564757752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68952 (or 68929 counting only the distinct ones).

The product of its digits is 12348000, while the sum is 54.

The square root of 6564757752 is about 81023.1926796272. The cubic root of 6564757752 is about 1872.4327771599.

The spelling of 6564757752 in words is "six billion, five hundred sixty-four million, seven hundred fifty-seven thousand, seven hundred fifty-two".