218642022729389 has 16 divisors (see below), whose sum is σ = 252474024811008. Its totient is φ = 185459704745472.

The previous prime is 218642022729323. The next prime is 218642022729391. The reversal of 218642022729389 is 983927220246812.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218642022729389 is a prime.

It is a super-2 number, since 2×218642022729389² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218642022749389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5608277 + ... + 21650330.

It is an arithmetic number, because the mean of its divisors is an integer number (15779626550688).

Almost surely, 2^{218642022729389} is an apocalyptic number.

It is an amenable number.

218642022729389 is a deficient number, since it is larger than the sum of its proper divisors (33832002081619).

218642022729389 is a wasteful number, since it uses less digits than its factorization.

218642022729389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27270524.

The product of its (nonzero) digits is 83607552, while the sum is 65.

The spelling of 218642022729389 in words is "two hundred eighteen trillion, six hundred forty-two billion, twenty-two million, seven hundred twenty-nine thousand, three hundred eighty-nine".