218664165588242 has 64 divisors (see below), whose sum is σ = 377117581800960. Its totient is φ = 94043828131200.

The previous prime is 218664165588203. The next prime is 218664165588293. The reversal of 218664165588242 is 242885561466812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6729975617 + ... + 6730008107.

It is an arithmetic number, because the mean of its divisors is an integer number (5892462215640).

Almost surely, 2^{218664165588242} is an apocalyptic number.

218664165588242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

218664165588242 is a deficient number, since it is larger than the sum of its proper divisors (158453416212718).

218664165588242 is a wasteful number, since it uses less digits than its factorization.

218664165588242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52167.

The product of its digits is 353894400, while the sum is 68.

The spelling of 218664165588242 in words is "two hundred eighteen trillion, six hundred sixty-four billion, one hundred sixty-five million, five hundred eighty-eight thousand, two hundred forty-two".