68185144 has 8 divisors (see below), whose sum is σ = 127847160. Its totient is φ = 34092568.

The previous prime is 68185141. The next prime is 68185207. The reversal of 68185144 is 44158186.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68185141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4261564 + ... + 4261579.

It is an arithmetic number, because the mean of its divisors is an integer number (15980895).

Almost surely, 2^68185144 is an apocalyptic number.

It is an amenable number.

68185144 is a deficient number, since it is larger than the sum of its proper divisors (59662016).

68185144 is a wasteful number, since it uses less digits than its factorization.

68185144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8523149 (or 8523145 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 68185144 is about 8257.4296242838. The cubic root of 68185144 is about 408.5356127131.

The spelling of 68185144 in words is "sixty-eight million, one hundred eighty-five thousand, one hundred forty-four".