68315018 has 4 divisors (see below), whose sum is σ = 102472530. Its totient is φ = 34157508.

The previous prime is 68314999. The next prime is 68315021. The reversal of 68315018 is 81051386.

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

It can be written as a sum of positive squares in only one way, i.e., 53392249 + 14922769 = 7307^2 + 3863^2 .

It is an unprimeable number.

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, 17078753 + ... + 17078756.

Almost surely, 2^68315018 is an apocalyptic number.

68315018 is a deficient number, since it is larger than the sum of its proper divisors (34157512).

68315018 is a wasteful number, since it uses less digits than its factorization.

68315018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34157511.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 68315018 is about 8265.2899525667. The cubic root of 68315018 is about 408.7948309708.

The spelling of 68315018 in words is "sixty-eight million, three hundred fifteen thousand, eighteen".