68394193920 has 1056 divisors, whose sum is σ = 274676613120. Its totient is φ = 15606743040.

The previous prime is 68394193897. The next prime is 68394193927. The reversal of 68394193920 is 2939149386.

68394193920 is a `hidden beast` number, since 68 + 394 + 193 + 9 + 2 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68394193927) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 538536897 + ... + 538537023.

Almost surely, 2^68394193920 is an apocalyptic number.

68394193920 is a gapful number since it is divisible by the number (60) 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 68394193920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137338306560).

68394193920 is an abundant number, since it is smaller than the sum of its proper divisors (206282419200).

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

68394193920 is a wasteful number, since it uses less digits than its factorization.

68394193920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 54.

The spelling of 68394193920 in words is "sixty-eight billion, three hundred ninety-four million, one hundred ninety-three thousand, nine hundred twenty".