68315318 has 4 divisors (see below), whose sum is σ = 102472980. Its totient is φ = 34157658.

The previous prime is 68315311. The next prime is 68315339. The reversal of 68315318 is 81351386.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×68315318² = 9333965346882248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68315311) by changing a digit.

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 as a sum of consecutive naturals, namely, 17078828 + ... + 17078831.

It is an arithmetic number, because the mean of its divisors is an integer number (25618245).

Almost surely, 2^68315318 is an apocalyptic number.

68315318 is a deficient number, since it is larger than the sum of its proper divisors (34157662).

68315318 is a wasteful number, since it uses less digits than its factorization.

68315318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34157661.

The product of its digits is 17280, while the sum is 35.

The square root of 68315318 is about 8265.3081007304. The cubic root of 68315318 is about 408.7954293667.

The spelling of 68315318 in words is "sixty-eight million, three hundred fifteen thousand, three hundred eighteen".