647644616 has 16 divisors (see below), whose sum is σ = 1217721600. Its totient is φ = 322918864.

The previous prime is 647644541. The next prime is 647644637. The reversal of 647644616 is 616446746.

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 3 ways as a sum of consecutive naturals, for example, 109880 + ... + 115623.

It is an arithmetic number, because the mean of its divisors is an integer number (76107600).

Almost surely, 2^647644616 is an apocalyptic number.

It is an amenable number.

647644616 is a deficient number, since it is larger than the sum of its proper divisors (570076984).

647644616 is a wasteful number, since it uses less digits than its factorization.

647644616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225868 (or 225864 counting only the distinct ones).

The product of its digits is 580608, while the sum is 44.

The square root of 647644616 is about 25448.8627643751. The cubic root of 647644616 is about 865.1915180641.

The spelling of 647644616 in words is "six hundred forty-seven million, six hundred forty-four thousand, six hundred sixteen".