6645117468 has 48 divisors (see below), whose sum is σ = 17460495360. Its totient is φ = 1948713600.

The previous prime is 6645117439. The next prime is 6645117487. The reversal of 6645117468 is 8647115466.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 807873 + ... + 816056.

It is an arithmetic number, because the mean of its divisors is an integer number (363760320).

Almost surely, 2^6645117468 is an apocalyptic number.

It is an amenable number.

6645117468 is an abundant number, since it is smaller than the sum of its proper divisors (10815377892).

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

6645117468 is a wasteful number, since it uses less digits than its factorization.

6645117468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623978 (or 1623976 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 6645117468 is about 81517.5899300268. The cubic root of 6645117468 is about 1880.0420116611.

The spelling of 6645117468 in words is "six billion, six hundred forty-five million, one hundred seventeen thousand, four hundred sixty-eight".