68181818 has 8 divisors (see below), whose sum is σ = 102487680. Its totient is φ = 34019260.

The previous prime is 68181809. The next prime is 68181829. The reversal of 68181818 is 81818186.

It is a sphenic number, since it is the product of 3 distinct primes.

68181818 is a modest number, since divided by 181818 gives 68 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34628 + ... + 36543.

It is an arithmetic number, because the mean of its divisors is an integer number (12810960).

Almost surely, 2^68181818 is an apocalyptic number.

68181818 is a deficient number, since it is larger than the sum of its proper divisors (34305862).

68181818 is a wasteful number, since it uses less digits than its factorization.

68181818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71652.

The product of its digits is 24576, while the sum is 41.

The square root of 68181818 is about 8257.2282274381. The cubic root of 68181818 is about 408.5289699585.

The spelling of 68181818 in words is "sixty-eight million, one hundred eighty-one thousand, eight hundred eighteen".