647647682680 has 64 divisors (see below), whose sum is σ = 1460795834880. Its totient is φ = 258421891200.

The previous prime is 647647682639. The next prime is 647647682681. The reversal of 647647682680 is 86286746746.

647647682680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647647682681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28485477 + ... + 28508203.

It is an arithmetic number, because the mean of its divisors is an integer number (22824934920).

Almost surely, 2^647647682680 is an apocalyptic number.

It is an amenable number.

647647682680 is an abundant number, since it is smaller than the sum of its proper divisors (813148152200).

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

647647682680 is a wasteful number, since it uses less digits than its factorization.

647647682680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24460 (or 24456 counting only the distinct ones).

The product of its (nonzero) digits is 130056192, while the sum is 64.

The spelling of 647647682680 in words is "six hundred forty-seven billion, six hundred forty-seven million, six hundred eighty-two thousand, six hundred eighty".