68091975168 has 640 divisors, whose sum is σ = 231475470336. Its totient is φ = 17340825600.

The previous prime is 68091975167. The next prime is 68091975181. The reversal of 68091975168 is 86157919086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68091975167) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 345644446 + ... + 345644642.

Almost surely, 2^68091975168 is an apocalyptic number.

68091975168 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 68091975168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115737735168).

68091975168 is an abundant number, since it is smaller than the sum of its proper divisors (163383495168).

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

68091975168 is a wasteful number, since it uses less digits than its factorization.

68091975168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 60.

The spelling of 68091975168 in words is "sixty-eight billion, ninety-one million, nine hundred seventy-five thousand, one hundred sixty-eight".