68163923520 has 2240 divisors, whose sum is σ = 334582617600. Its totient is φ = 13005619200.

The previous prime is 68163923491. The next prime is 68163923551. The reversal of 68163923520 is 2532936186.

68163923520 is a `hidden beast` number, since 6 + 8 + 1 + 639 + 2 + 3 + 5 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 1662534700 + ... + 1662534740.

It is an arithmetic number, because the mean of its divisors is an integer number (149367240).

Almost surely, 2^68163923520 is an apocalyptic number.

68163923520 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 68163923520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167291308800).

68163923520 is an abundant number, since it is smaller than the sum of its proper divisors (266418694080).

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

68163923520 is a wasteful number, since it uses less digits than its factorization.

68163923520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 68163923520 in words is "sixty-eight billion, one hundred sixty-three million, nine hundred twenty-three thousand, five hundred twenty".