68181500 has 48 divisors (see below), whose sum is σ = 156767520. Its totient is φ = 25833600.

The previous prime is 68181473. The next prime is 68181511. The reversal of 68181500 is 518186.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5912 + ... + 13088.

It is an arithmetic number, because the mean of its divisors is an integer number (3265990).

Almost surely, 2^68181500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68181500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78383760).

68181500 is an abundant number, since it is smaller than the sum of its proper divisors (88586020).

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

68181500 is a wasteful number, since it uses less digits than its factorization.

68181500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7215 (or 7203 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 68181500 is about 8257.2089715593. The cubic root of 68181500 is about 408.5283348311.

Adding to 68181500 its reverse (518186), we get a palindrome (68699686).

The spelling of 68181500 in words is "sixty-eight million, one hundred eighty-one thousand, five hundred".