6516128008 has 16 divisors (see below), whose sum is σ = 13157566380. Its totient is φ = 3007443648.

The previous prime is 6516127993. The next prime is 6516128009. The reversal of 6516128008 is 8008216156.

It can be written as a sum of positive squares in 2 ways, for example, as 6346034244 + 170093764 = 79662^2 + 13042^2 .

It is not an unprimeable number, because it can be changed into a prime (6516128009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31327435 + ... + 31327642.

Almost surely, 2^6516128008 is an apocalyptic number.

It is an amenable number.

6516128008 is an abundant number, since it is smaller than the sum of its proper divisors (6641438372).

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

6516128008 is a wasteful number, since it uses less digits than its factorization.

6516128008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62655096 (or 62655092 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 6516128008 is about 80722.5371751904. The cubic root of 6516128008 is about 1867.7978412276.

The spelling of 6516128008 in words is "six billion, five hundred sixteen million, one hundred twenty-eight thousand, eight".