68081858208 has 504 divisors, whose sum is σ = 248798033568. Its totient is φ = 17948376576.

The previous prime is 68081858107. The next prime is 68081858249. The reversal of 68081858208 is 80285818086.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (504).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 83 ways as a sum of consecutive naturals, for example, 27595791 + ... + 27598257.

It is an arithmetic number, because the mean of its divisors is an integer number (493646892).

Almost surely, 2^68081858208 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 68081858208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124399016784).

68081858208 is an abundant number, since it is smaller than the sum of its proper divisors (180716175360).

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

68081858208 is a wasteful number, since it uses less digits than its factorization.

68081858208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2528 (or 2492 counting only the distinct ones).

The product of its (nonzero) digits is 1966080, while the sum is 54.

The spelling of 68081858208 in words is "sixty-eight billion, eighty-one million, eight hundred fifty-eight thousand, two hundred eight".