6512645328 has 160 divisors (see below), whose sum is σ = 20856165120. Its totient is φ = 1708523520.

The previous prime is 6512645327. The next prime is 6512645341. The reversal of 6512645328 is 8235462156.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 6512645328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6512645327) 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 31 ways as a sum of consecutive naturals, for example, 220288 + ... + 248096.

It is an arithmetic number, because the mean of its divisors is an integer number (130351032).

Almost surely, 2^6512645328 is an apocalyptic number.

6512645328 is a gapful number since it is divisible by the number (68) 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 6512645328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10428082560).

6512645328 is an abundant number, since it is smaller than the sum of its proper divisors (14343519792).

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

6512645328 is a wasteful number, since it uses less digits than its factorization.

6512645328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27885 (or 27879 counting only the distinct ones).

The product of its digits is 345600, while the sum is 42.

The square root of 6512645328 is about 80700.9623734438. The cubic root of 6512645328 is about 1867.4650208051.

The spelling of 6512645328 in words is "six billion, five hundred twelve million, six hundred forty-five thousand, three hundred twenty-eight".