6647847403648 has 64 divisors (see below), whose sum is σ = 14451829812000. Its totient is φ = 3020892712960.

The previous prime is 6647847403579. The next prime is 6647847403649. The reversal of 6647847403648 is 8463047487466.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (6647847403649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4315848 + ... + 5649976.

Almost surely, 2^{6647847403648} is an apocalyptic number.

It is an amenable number.

6647847403648 is an abundant number, since it is smaller than the sum of its proper divisors (7803982408352).

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

6647847403648 is a wasteful number, since it uses less digits than its factorization.

6647847403648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337693 (or 1337681 counting only the distinct ones).

The product of its (nonzero) digits is 520224768, while the sum is 67.

The spelling of 6647847403648 in words is "six trillion, six hundred forty-seven billion, eight hundred forty-seven million, four hundred three thousand, six hundred forty-eight".