68555732168 has 64 divisors (see below), whose sum is σ = 160606955520. Its totient is φ = 26652225600.

The previous prime is 68555732149. The next prime is 68555732171. The reversal of 68555732168 is 86123755586.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165023 + ... + 405393.

It is an arithmetic number, because the mean of its divisors is an integer number (2509483680).

Almost surely, 2^68555732168 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 68555732168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80303477760).

68555732168 is an abundant number, since it is smaller than the sum of its proper divisors (92051223352).

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

68555732168 is a wasteful number, since it uses less digits than its factorization.

68555732168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240858 (or 240854 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 56.

The spelling of 68555732168 in words is "sixty-eight billion, five hundred fifty-five million, seven hundred thirty-two thousand, one hundred sixty-eight".