6564989016 has 48 divisors (see below), whose sum is σ = 17788399200. Its totient is φ = 2187317952.

The previous prime is 6564988981. The next prime is 6564989027. The reversal of 6564989016 is 6109894656.

It is a happy number.

6564989016 is a `hidden beast` number, since 6 + 56 + 498 + 90 + 16 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144730 + ... + 184598.

It is an arithmetic number, because the mean of its divisors is an integer number (370591650).

Almost surely, 2^6564989016 is an apocalyptic number.

It is an amenable number.

6564989016 is an abundant number, since it is smaller than the sum of its proper divisors (11223410184).

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

6564989016 is a wasteful number, since it uses less digits than its factorization.

6564989016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42168 (or 42161 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The square root of 6564989016 is about 81024.6198139800. The cubic root of 6564989016 is about 1872.4547643236.

The spelling of 6564989016 in words is "six billion, five hundred sixty-four million, nine hundred eighty-nine thousand, sixteen".