68255520 has 96 divisors (see below), whose sum is σ = 219143232. Its totient is φ = 17851392.

The previous prime is 68255501. The next prime is 68255557. The reversal of 68255520 is 2555286.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24099 + ... + 26781.

It is an arithmetic number, because the mean of its divisors is an integer number (2282742).

Almost surely, 2^68255520 is an apocalyptic number.

68255520 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 68255520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109571616).

68255520 is an abundant number, since it is smaller than the sum of its proper divisors (150887712).

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

68255520 is a wasteful number, since it uses less digits than its factorization.

68255520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2754 (or 2746 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 68255520 is about 8261.6898997723. The cubic root of 68255520 is about 408.6761184725.

The spelling of 68255520 in words is "sixty-eight million, two hundred fifty-five thousand, five hundred twenty".