6539309568 has 120 divisors (see below), whose sum is σ = 20588767056. Its totient is φ = 1981593600.

The previous prime is 6539309533. The next prime is 6539309587. The reversal of 6539309568 is 8659039356.

It is a super-2 number, since 2×6539309568² = 85525139252272693248, which contains 22 as substring.

It is an unprimeable number.

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, 13818 + ... + 115193.

Almost surely, 2^6539309568 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 6539309568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10294383528).

6539309568 is an abundant number, since it is smaller than the sum of its proper divisors (14049457488).

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

6539309568 is a wasteful number, since it uses less digits than its factorization.

6539309568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129046 (or 129027 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 54.

The square root of 6539309568 is about 80865.9976009695. The cubic root of 6539309568 is about 1870.0101582755.

The spelling of 6539309568 in words is "six billion, five hundred thirty-nine million, three hundred nine thousand, five hundred sixty-eight".