68216918 has 24 divisors (see below), whose sum is σ = 129854664. Its totient is φ = 26577600.

The previous prime is 68216879. The next prime is 68216947. The reversal of 68216918 is 81961286.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30563 + ... + 32718.

It is an arithmetic number, because the mean of its divisors is an integer number (5410611).

Almost surely, 2^68216918 is an apocalyptic number.

68216918 is a deficient number, since it is larger than the sum of its proper divisors (61637746).

68216918 is a wasteful number, since it uses less digits than its factorization.

68216918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63308 (or 63301 counting only the distinct ones).

The product of its digits is 41472, while the sum is 41.

The square root of 68216918 is about 8259.3533645195. The cubic root of 68216918 is about 408.5990615036.

The spelling of 68216918 in words is "sixty-eight million, two hundred sixteen thousand, nine hundred eighteen".