217018131679364 has 6 divisors (see below), whose sum is σ = 379781730438894. Its totient is φ = 108509065839680.

The previous prime is 217018131679331. The next prime is 217018131679417. The reversal of 217018131679364 is 463976131810712.

It can be written as a sum of positive squares in only one way, i.e., 208207872948100 + 8810258731264 = 14429410^2 + 2968208^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27127266459917 + ... + 27127266459924.

It is an arithmetic number, because the mean of its divisors is an integer number (63296955073149).

Almost surely, 2^{217018131679364} is an apocalyptic number.

It is an amenable number.

217018131679364 is a deficient number, since it is larger than the sum of its proper divisors (162763598759530).

217018131679364 is a wasteful number, since it uses less digits than its factorization.

217018131679364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54254532919845 (or 54254532919843 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 59.

The spelling of 217018131679364 in words is "two hundred seventeen trillion, eighteen billion, one hundred thirty-one million, six hundred seventy-nine thousand, three hundred sixty-four".