64688893217208 has 192 divisors, whose sum is σ = 189424144728000. Its totient is φ = 19825473890304.

The previous prime is 64688893217161. The next prime is 64688893217281. The reversal of 64688893217208 is 80271239888646.

64688893217208 is a `hidden beast` number, since 6 + 46 + 8 + 88 + 93 + 217 + 208 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 286515628 + ... + 286741316.

It is an arithmetic number, because the mean of its divisors is an integer number (986584087125).

Almost surely, 2^{64688893217208} 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 64688893217208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94712072364000).

64688893217208 is an abundant number, since it is smaller than the sum of its proper divisors (124735251510792).

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

64688893217208 is a wasteful number, since it uses less digits than its factorization.

64688893217208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226926 (or 226919 counting only the distinct ones).

The product of its (nonzero) digits is 445906944, while the sum is 72.

The spelling of 64688893217208 in words is "sixty-four trillion, six hundred eighty-eight billion, eight hundred ninety-three million, two hundred seventeen thousand, two hundred eight".