68181810238 has 16 divisors (see below), whose sum is σ = 102933698400. Its totient is φ = 33871068000.

The previous prime is 68181810227. The next prime is 68181810283. The reversal of 68181810238 is 83201818186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156808 + ... + 401188.

It is an arithmetic number, because the mean of its divisors is an integer number (6433356150).

Almost surely, 2^68181810238 is an apocalyptic number.

68181810238 is a deficient number, since it is larger than the sum of its proper divisors (34751888162).

68181810238 is a wasteful number, since it uses less digits than its factorization.

68181810238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245283.

The product of its (nonzero) digits is 147456, while the sum is 46.

The spelling of 68181810238 in words is "sixty-eight billion, one hundred eighty-one million, eight hundred ten thousand, two hundred thirty-eight".