647928838512 has 30 divisors (see below), whose sum is σ = 1813300847072. Its totient is φ = 215976279456.

The previous prime is 647928838507. The next prime is 647928838537. The reversal of 647928838512 is 215838829746.

647928838512 is a `hidden beast` number, since 6 + 4 + 7 + 9 + 2 + 88 + 38 + 512 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 647928838512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2249752768 + ... + 2249753055.

Almost surely, 2^647928838512 is an apocalyptic number.

It is an amenable number.

647928838512 is an abundant number, since it is smaller than the sum of its proper divisors (1165372008560).

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

647928838512 is a wasteful number, since it uses less digits than its factorization.

647928838512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4499505837 (or 4499505828 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 63.

The spelling of 647928838512 in words is "six hundred forty-seven billion, nine hundred twenty-eight million, eight hundred thirty-eight thousand, five hundred twelve".