6591000000 has 392 divisors, whose sum is σ = 23613760240. Its totient is φ = 1622400000.

The previous prime is 6590999981. The next prime is 6591000007. The reversal of 6591000000 is 1956.

It is an ABA number since it can be written as A⋅B^A, here for A=3, B=1300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6591000007) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 506999994 + ... + 507000006.

Almost surely, 2^6591000000 is an apocalyptic number.

6591000000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6591000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11806880120).

6591000000 is an abundant number, since it is smaller than the sum of its proper divisors (17022760240).

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

6591000000 is an frugal number, since it uses more digits than its factorization.

6591000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 6591000000 is about 81184.9739791792. The cubic root of 6591000000 is about 1874.9244413996.

Adding to 6591000000 its reverse (1956), we get a palindrome (6591001956).

The spelling of 6591000000 in words is "six billion, five hundred ninety-one million", and thus it is an aban number.