647343333648 has 280 divisors, whose sum is σ = 2053342327680. Its totient is φ = 195982260480.

The previous prime is 647343333643. The next prime is 647343333661. The reversal of 647343333648 is 846333343746.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 647343333594 and 647343333603.

It is not an unprimeable number, because it can be changed into a prime (647343333643) 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 55 ways as a sum of consecutive naturals, for example, 214137865 + ... + 214140887.

It is an arithmetic number, because the mean of its divisors is an integer number (7333365456).

Almost surely, 2^647343333648 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 647343333648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1026671163840).

647343333648 is an abundant number, since it is smaller than the sum of its proper divisors (1405998994032).

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

647343333648 is a wasteful number, since it uses less digits than its factorization.

647343333648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4729 (or 4708 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 54.

The spelling of 647343333648 in words is "six hundred forty-seven billion, three hundred forty-three million, three hundred thirty-three thousand, six hundred forty-eight".