68558645568 has 168 divisors, whose sum is σ = 223423106112. Its totient is φ = 18435895296.

The previous prime is 68558645563. The next prime is 68558645609. The reversal of 68558645568 is 86554685586.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 68558645499 and 68558645508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68558645563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54396 + ... + 374267.

Almost surely, 2^68558645568 is an apocalyptic number.

68558645568 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 68558645568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111711553056).

68558645568 is an abundant number, since it is smaller than the sum of its proper divisors (154864460544).

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

68558645568 is a wasteful number, since it uses less digits than its factorization.

68558645568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428709 (or 428692 counting only the distinct ones).

The product of its digits is 276480000, while the sum is 66.

The spelling of 68558645568 in words is "sixty-eight billion, five hundred fifty-eight million, six hundred forty-five thousand, five hundred sixty-eight".