647289796608 has 864 divisors, whose sum is σ = 2430658994400. Its totient is φ = 161577566208.

The previous prime is 647289796603. The next prime is 647289796631. The reversal of 647289796608 is 806697982746.

647289796608 is a `hidden beast` number, since 6 + 4 + 7 + 2 + 8 + 9 + 7 + 9 + 6 + 608 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647289796603) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 605509098 + ... + 605510166.

It is an arithmetic number, because the mean of its divisors is an integer number (2813262725).

Almost surely, 2^647289796608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647289796608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1215329497200).

647289796608 is an abundant number, since it is smaller than the sum of its proper divisors (1783369197792).

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

647289796608 is a wasteful number, since it uses less digits than its factorization.

647289796608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155 (or 1113 counting only the distinct ones).

The product of its (nonzero) digits is 438939648, while the sum is 72.

The spelling of 647289796608 in words is "six hundred forty-seven billion, two hundred eighty-nine million, seven hundred ninety-six thousand, six hundred eight".