6509633128 has 16 divisors (see below), whose sum is σ = 12209278500. Its totient is φ = 3253825536.

The previous prime is 6509633093. The next prime is 6509633129. The reversal of 6509633128 is 8213369056.

It can be written as a sum of positive squares in 2 ways, for example, as 6476708484 + 32924644 = 80478^2 + 5738^2 .

It is a super-2 number, since 2×6509633128² = 84750646922310128768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6509633129) 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, 95583 + ... + 148846.

Almost surely, 2^6509633128 is an apocalyptic number.

It is an amenable number.

6509633128 is a deficient number, since it is larger than the sum of its proper divisors (5699645372).

6509633128 is a wasteful number, since it uses less digits than its factorization.

6509633128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247764 (or 247760 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 6509633128 is about 80682.2974883586. The cubic root of 6509633128 is about 1867.1770658436.

The spelling of 6509633128 in words is "six billion, five hundred nine million, six hundred thirty-three thousand, one hundred twenty-eight".