68517453888 has 672 divisors, whose sum is σ = 234853032960. Its totient is φ = 18897960960.

The previous prime is 68517453883. The next prime is 68517453899. The reversal of 68517453888 is 88835471586.

68517453888 is a `hidden beast` number, since 6 + 8 + 5 + 17 + 4 + 538 + 88 = 666.

It is not an unprimeable number, because it can be changed into a prime (68517453883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 382778983 + ... + 382779161.

It is an arithmetic number, because the mean of its divisors is an integer number (349483680).

Almost surely, 2^68517453888 is an apocalyptic number.

68517453888 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 68517453888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117426516480).

68517453888 is an abundant number, since it is smaller than the sum of its proper divisors (166335579072).

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

68517453888 is a wasteful number, since it uses less digits than its factorization.

68517453888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355 (or 342 counting only the distinct ones).

The product of its digits is 51609600, while the sum is 63.

The spelling of 68517453888 in words is "sixty-eight billion, five hundred seventeen million, four hundred fifty-three thousand, eight hundred eighty-eight".