647547684580 has 48 divisors (see below), whose sum is σ = 1361853440640. Its totient is φ = 258637795328.

The previous prime is 647547684569. The next prime is 647547684583. The reversal of 647547684580 is 85486745746.

It is not an unprimeable number, because it can be changed into a prime (647547684583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40204809 + ... + 40220911.

It is an arithmetic number, because the mean of its divisors is an integer number (28371946680).

Almost surely, 2^647547684580 is an apocalyptic number.

It is an amenable number.

647547684580 is an abundant number, since it is smaller than the sum of its proper divisors (714305756060).

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

647547684580 is a wasteful number, since it uses less digits than its factorization.

647547684580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18948 (or 18946 counting only the distinct ones).

The product of its (nonzero) digits is 180633600, while the sum is 64.

The spelling of 647547684580 in words is "six hundred forty-seven billion, five hundred forty-seven million, six hundred eighty-four thousand, five hundred eighty".