6500640000 has 360 divisors, whose sum is σ = 22412950560. Its totient is φ = 1670144000.

The previous prime is 6500639989. The next prime is 6500640017. The reversal of 6500640000 is 460056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13919767 + ... + 13920233.

It is an arithmetic number, because the mean of its divisors is an integer number (62258196).

Almost surely, 2^6500640000 is an apocalyptic number.

6500640000 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 6500640000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11206475280).

6500640000 is an abundant number, since it is smaller than the sum of its proper divisors (15912310560).

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

6500640000 is an equidigital number, since it uses as much as digits as its factorization.

6500640000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 6500640000 is about 80626.5464967960. The cubic root of 6500640000 is about 1866.3168278636.

The spelling of 6500640000 in words is "six billion, five hundred million, six hundred forty thousand".