68105550 has 48 divisors (see below), whose sum is σ = 172846080. Its totient is φ = 17737440.

The previous prime is 68105549. The next prime is 68105563. The reversal of 68105550 is 5550186.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 23 ways as a sum of consecutive naturals, for example, 1171 + ... + 11729.

It is an arithmetic number, because the mean of its divisors is an integer number (3600960).

Almost surely, 2^68105550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68105550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86423040).

68105550 is an abundant number, since it is smaller than the sum of its proper divisors (104740530).

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

68105550 is a wasteful number, since it uses less digits than its factorization.

68105550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10617 (or 10612 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 68105550 is about 8252.6086784725. The cubic root of 68105550 is about 408.3765866533.

The spelling of 68105550 in words is "sixty-eight million, one hundred five thousand, five hundred fifty".