647051568 has 20 divisors (see below), whose sum is σ = 1671550008. Its totient is φ = 215683840.

The previous prime is 647051563. The next prime is 647051599. The reversal of 647051568 is 865150746.

It is not an unprimeable number, because it can be changed into a prime (647051563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6740073 + ... + 6740168.

Almost surely, 2^647051568 is an apocalyptic number.

It is an amenable number.

647051568 is an abundant number, since it is smaller than the sum of its proper divisors (1024498440).

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

647051568 is a wasteful number, since it uses less digits than its factorization.

647051568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13480252 (or 13480246 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 647051568 is about 25437.2083373943. The cubic root of 647051568 is about 864.9273522023.

The spelling of 647051568 in words is "six hundred forty-seven million, fifty-one thousand, five hundred sixty-eight".