647167303662168 has 128 divisors (see below), whose sum is σ = 1717108995813120. Its totient is φ = 202557102612480.

The previous prime is 647167303662167. The next prime is 647167303662179. The reversal of 647167303662168 is 861266303761746.

It is a junction number, because it is equal to n+sod(n) for n = 647167303662099 and 647167303662108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647167303662167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296174955 + ... + 298352037.

It is an arithmetic number, because the mean of its divisors is an integer number (13414914029790).

Almost surely, 2^{647167303662168} is an apocalyptic number.

647167303662168 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647167303662168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (858554497906560).

647167303662168 is an abundant number, since it is smaller than the sum of its proper divisors (1069941692150952).

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

647167303662168 is a wasteful number, since it uses less digits than its factorization.

647167303662168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178817 (or 2178813 counting only the distinct ones).

The product of its (nonzero) digits is 219469824, while the sum is 66.

The spelling of 647167303662168 in words is "six hundred forty-seven trillion, one hundred sixty-seven billion, three hundred three million, six hundred sixty-two thousand, one hundred sixty-eight".