647385888268 has 24 divisors (see below), whose sum is σ = 1296482217632. Its totient is φ = 277084571904.

The previous prime is 647385888209. The next prime is 647385888311. The reversal of 647385888268 is 862888583746.

647385888268 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 647385888268.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15250221 + ... + 15292612.

Almost surely, 2^647385888268 is an apocalyptic number.

It is an amenable number.

647385888268 is an abundant number, since it is smaller than the sum of its proper divisors (649096329364).

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

647385888268 is a wasteful number, since it uses less digits than its factorization.

647385888268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30543601 (or 30543599 counting only the distinct ones).

The product of its digits is 990904320, while the sum is 73.

The spelling of 647385888268 in words is "six hundred forty-seven billion, three hundred eighty-five million, eight hundred eighty-eight thousand, two hundred sixty-eight".