6549686064 has 60 divisors (see below), whose sum is σ = 18378038016. Its totient is φ = 2177510016.

The previous prime is 6549686063. The next prime is 6549686113. The reversal of 6549686064 is 4606869456.

It is a self number, because there is not a number n which added to its sum of digits gives 6549686064.

It is not an unprimeable number, because it can be changed into a prime (6549686063) 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 11 ways as a sum of consecutive naturals, for example, 4227 + ... + 114530.

Almost surely, 2^6549686064 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 6549686064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9189019008).

6549686064 is an abundant number, since it is smaller than the sum of its proper divisors (11828351952).

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

6549686064 is a wasteful number, since it uses less digits than its factorization.

6549686064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119154 (or 119145 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The square root of 6549686064 is about 80930.1307548678. The cubic root of 6549686064 is about 1870.9987386111.

The spelling of 6549686064 in words is "six billion, five hundred forty-nine million, six hundred eighty-six thousand, sixty-four".