68121518 has 32 divisors (see below), whose sum is σ = 108241920. Its totient is φ = 32122720.

The previous prime is 68121497. The next prime is 68121523. The reversal of 68121518 is 81512186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 393680 + ... + 393852.

It is an arithmetic number, because the mean of its divisors is an integer number (3382560).

Almost surely, 2^68121518 is an apocalyptic number.

68121518 is a deficient number, since it is larger than the sum of its proper divisors (40120402).

68121518 is a wasteful number, since it uses less digits than its factorization.

68121518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352.

The product of its digits is 3840, while the sum is 32.

The square root of 68121518 is about 8253.5760734363. The cubic root of 68121518 is about 408.4085000963.

The spelling of 68121518 in words is "sixty-eight million, one hundred twenty-one thousand, five hundred eighteen".