68102721168 has 80 divisors (see below), whose sum is σ = 178657856832. Its totient is φ = 22351680000.

The previous prime is 68102721161. The next prime is 68102721229. The reversal of 68102721168 is 86112720186.

It is not an unprimeable number, because it can be changed into a prime (68102721161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 838683 + ... + 916293.

Almost surely, 2^68102721168 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 68102721168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89328928416).

68102721168 is an abundant number, since it is smaller than the sum of its proper divisors (110555135664).

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

68102721168 is a wasteful number, since it uses less digits than its factorization.

68102721168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77904 (or 77898 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The spelling of 68102721168 in words is "sixty-eight billion, one hundred two million, seven hundred twenty-one thousand, one hundred sixty-eight".