218579938851 has 16 divisors (see below), whose sum is σ = 295158863360. Its totient is φ = 143860860000.

The previous prime is 218579938847. The next prime is 218579938867. The reversal of 218579938851 is 158839975812.

It is not a de Polignac number, because 218579938851 - 2² = 218579938847 is a prime.

It is a super-3 number, since 3×218579938851³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218579938051) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 2625501 + ... + 2707473.

It is an arithmetic number, because the mean of its divisors is an integer number (18447428960).

Almost surely, 2^218579938851 is an apocalyptic number.

218579938851 is a deficient number, since it is larger than the sum of its proper divisors (76578924509).

218579938851 is a wasteful number, since it uses less digits than its factorization.

218579938851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93306.

The product of its digits is 43545600, while the sum is 66.

The spelling of 218579938851 in words is "two hundred eighteen billion, five hundred seventy-nine million, nine hundred thirty-eight thousand, eight hundred fifty-one".