6564870620 has 192 divisors, whose sum is σ = 18788474880. Its totient is φ = 1863475200.

The previous prime is 6564870601. The next prime is 6564870623. The reversal of 6564870620 is 260784656.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6564870623) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 807536 + ... + 815624.

It is an arithmetic number, because the mean of its divisors is an integer number (97856640).

Almost surely, 2^6564870620 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 6564870620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9394237440).

6564870620 is an abundant number, since it is smaller than the sum of its proper divisors (12223604260).

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

6564870620 is a wasteful number, since it uses less digits than its factorization.

6564870620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8164 (or 8162 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The square root of 6564870620 is about 81023.8891932497. The cubic root of 6564870620 is about 1872.4435080221.

The spelling of 6564870620 in words is "six billion, five hundred sixty-four million, eight hundred seventy thousand, six hundred twenty".