6440804608 has 72 divisors (see below), whose sum is σ = 14993148800. Its totient is φ = 2760307200.

The previous prime is 6440804597. The next prime is 6440804611. The reversal of 6440804608 is 8064080446.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51133 + ... + 124483.

Almost surely, 2^6440804608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6440804608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7496574400).

6440804608 is an abundant number, since it is smaller than the sum of its proper divisors (8552344192).

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

6440804608 is an frugal number, since it uses more digits than its factorization.

6440804608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73388 (or 73360 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The square root of 6440804608 is about 80254.6235926629. The cubic root of 6440804608 is about 1860.5729733598.

The spelling of 6440804608 in words is "six billion, four hundred forty million, eight hundred four thousand, six hundred eight".