6501000000 has 392 divisors, whose sum is σ = 23574073248. Its totient is φ = 1568000000.

The previous prime is 6500999993. The next prime is 6501000001. The reversal of 6501000000 is 1056.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 6501000000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6501000001) 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, 32999902 + ... + 33000098.

Almost surely, 2^6501000000 is an apocalyptic number.

6501000000 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 6501000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11787036624).

6501000000 is an abundant number, since it is smaller than the sum of its proper divisors (17073073248).

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

6501000000 is an equidigital number, since it uses as much as digits as its factorization.

6501000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 6501000000 is about 80628.7789812050. The cubic root of 6501000000 is about 1866.3512789154.

Adding to 6501000000 its reverse (1056), we get a palindrome (6501001056).

The spelling of 6501000000 in words is "six billion, five hundred one million", and thus it is an aban number.