647430438064 has 40 divisors (see below), whose sum is σ = 1267805373120. Its totient is φ = 320272562688.

The previous prime is 647430438043. The next prime is 647430438107. The reversal of 647430438064 is 460834034746.

It is a junction number, because it is equal to n+sod(n) for n = 647430437999 and 647430438017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32217 + ... + 1138375.

It is an arithmetic number, because the mean of its divisors is an integer number (31695134328).

Almost surely, 2^647430438064 is an apocalyptic number.

It is an amenable number.

647430438064 is a deficient number, since it is larger than the sum of its proper divisors (620374935056).

647430438064 is a wasteful number, since it uses less digits than its factorization.

647430438064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106557 (or 1106551 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 49.

The spelling of 647430438064 in words is "six hundred forty-seven billion, four hundred thirty million, four hundred thirty-eight thousand, sixty-four".