64944661850208 has 960 divisors, whose sum is σ = 229542117235200. Its totient is φ = 17628615843840.

The previous prime is 64944661850197. The next prime is 64944661850213. The reversal of 64944661850208 is 80205816644946.

64944661850208 is a `hidden beast` number, since 6 + 4 + 9 + 4 + 4 + 6 + 618 + 5 + 0 + 2 + 0 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 4696259038 + ... + 4696272866.

It is an arithmetic number, because the mean of its divisors is an integer number (239106372120).

Almost surely, 2^{64944661850208} 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 64944661850208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114771058617600).

64944661850208 is an abundant number, since it is smaller than the sum of its proper divisors (164597455384992).

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

64944661850208 is a wasteful number, since it uses less digits than its factorization.

64944661850208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14065 (or 14048 counting only the distinct ones).

The product of its (nonzero) digits is 79626240, while the sum is 63.

The spelling of 64944661850208 in words is "sixty-four trillion, nine hundred forty-four billion, six hundred sixty-one million, eight hundred fifty thousand, two hundred eight".