68544218 has 8 divisors (see below), whose sum is σ = 103726548. Its totient is φ = 33968704.

The previous prime is 68544167. The next prime is 68544263. The reversal of 68544218 is 81244586.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 63313849 + 5230369 = 7957^2 + 2287^2 .

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

It is a Curzon number.

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, 151421 + ... + 151872.

Almost surely, 2^68544218 is an apocalyptic number.

68544218 is a deficient number, since it is larger than the sum of its proper divisors (35182330).

68544218 is a wasteful number, since it uses less digits than its factorization.

68544218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303408.

The product of its digits is 61440, while the sum is 38.

The square root of 68544218 is about 8279.1435547404. The cubic root of 68544218 is about 409.2514957391.

The spelling of 68544218 in words is "sixty-eight million, five hundred forty-four thousand, two hundred eighteen".