218643029315066 has 8 divisors (see below), whose sum is σ = 331211717675604. Its totient is φ = 108239123423200.

The previous prime is 218643029314991. The next prime is 218643029315089. The reversal of 218643029315066 is 660513920346812.

It can be written as a sum of positive squares in 2 ways, for example, as 214573308119041 + 4069721196025 = 14648321^2 + 2017355^2 .

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

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, 541195616915 + ... + 541195617318.

Almost surely, 2^{218643029315066} is an apocalyptic number.

218643029315066 is a deficient number, since it is larger than the sum of its proper divisors (112568688360538).

218643029315066 is a wasteful number, since it uses less digits than its factorization.

218643029315066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082391234336.

The product of its (nonzero) digits is 11197440, while the sum is 56.

The spelling of 218643029315066 in words is "two hundred eighteen trillion, six hundred forty-three billion, twenty-nine million, three hundred fifteen thousand, sixty-six".