68085174864 has 160 divisors (see below), whose sum is σ = 211730734080. Its totient is φ = 18417079296.

The previous prime is 68085174851. The next prime is 68085174869. The reversal of 68085174864 is 46847158086.

It is a super-2 number, since 2×68085174864² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68085174869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14661727 + ... + 14666369.

It is an arithmetic number, because the mean of its divisors is an integer number (1323317088).

Almost surely, 2^68085174864 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 68085174864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105865367040).

68085174864 is an abundant number, since it is smaller than the sum of its proper divisors (143645559216).

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

68085174864 is a wasteful number, since it uses less digits than its factorization.

68085174864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6977 (or 6971 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 57.

The spelling of 68085174864 in words is "sixty-eight billion, eighty-five million, one hundred seventy-four thousand, eight hundred sixty-four".