68663384064 has 432 divisors, whose sum is σ = 230929597080. Its totient is φ = 19572326400.

The previous prime is 68663384057. The next prime is 68663384077. The reversal of 68663384064 is 46048336686.

It is a super-2 number, since 2×68663384064² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68663384064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 37913719 + ... + 37915529.

Almost surely, 2^68663384064 is an apocalyptic number.

68663384064 is a gapful number since it is divisible by the number (64) 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 68663384064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115464798540).

68663384064 is an abundant number, since it is smaller than the sum of its proper divisors (162266213016).

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

68663384064 is a wasteful number, since it uses less digits than its factorization.

68663384064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878 (or 1844 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 54.

The spelling of 68663384064 in words is "sixty-eight billion, six hundred sixty-three million, three hundred eighty-four thousand, sixty-four".