218061788285 has 64 divisors (see below), whose sum is σ = 299748556800. Its totient is φ = 150852844800.

The previous prime is 218061788249. The next prime is 218061788293. The reversal of 218061788285 is 582887160812.

It is a happy number.

It is not a de Polignac number, because 218061788285 - 2¹⁸ = 218061526141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 218061788285.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23597696 + ... + 23606934.

It is an arithmetic number, because the mean of its divisors is an integer number (4683571200).

Almost surely, 2^218061788285 is an apocalyptic number.

It is an amenable number.

218061788285 is a deficient number, since it is larger than the sum of its proper divisors (81686768515).

218061788285 is a wasteful number, since it uses less digits than its factorization.

218061788285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9522.

The product of its (nonzero) digits is 3440640, while the sum is 56.

The spelling of 218061788285 in words is "two hundred eighteen billion, sixty-one million, seven hundred eighty-eight thousand, two hundred eighty-five".