68855021760 has 224 divisors, whose sum is σ = 251525836800. Its totient is φ = 15632437248.

The previous prime is 68855021759. The next prime is 68855021773. The reversal of 68855021760 is 6712055886.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 966897 + ... + 1035663.

It is an arithmetic number, because the mean of its divisors is an integer number (1122883200).

Almost surely, 2^68855021760 is an apocalyptic number.

68855021760 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 68855021760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125762918400).

68855021760 is an abundant number, since it is smaller than the sum of its proper divisors (182670815040).

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

68855021760 is a wasteful number, since it uses less digits than its factorization.

68855021760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68943 (or 68933 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 68855021760 in words is "sixty-eight billion, eight hundred fifty-five million, twenty-one thousand, seven hundred sixty".