647471650672 has 40 divisors (see below), whose sum is σ = 1564022431872. Its totient is φ = 252261681600.

The previous prime is 647471650669. The next prime is 647471650673. The reversal of 647471650672 is 276056174746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647471650673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262771354 + ... + 262773817.

Almost surely, 2^647471650672 is an apocalyptic number.

It is an amenable number.

647471650672 is an abundant number, since it is smaller than the sum of its proper divisors (916550781200).

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

647471650672 is a wasteful number, since it uses less digits than its factorization.

647471650672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525545197 (or 525545191 counting only the distinct ones).

The product of its (nonzero) digits is 11854080, while the sum is 55.

The spelling of 647471650672 in words is "six hundred forty-seven billion, four hundred seventy-one million, six hundred fifty thousand, six hundred seventy-two".