218836323135 has 64 divisors (see below), whose sum is σ = 406191836160. Its totient is φ = 111573728640.

The previous prime is 218836323133. The next prime is 218836323187. The reversal of 218836323135 is 531323638812.

218836323135 is a `hidden beast` number, since 2 + 1 + 8 + 8 + 3 + 632 + 3 + 1 + 3 + 5 = 666.

It is not a de Polignac number, because 218836323135 - 2¹ = 218836323133 is a prime.

It is a super-2 number, since 2×218836323135² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218836323133) by changing a digit.

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, 5603697 + ... + 5642613.

It is an arithmetic number, because the mean of its divisors is an integer number (6346747440).

Almost surely, 2^218836323135 is an apocalyptic number.

218836323135 is a deficient number, since it is larger than the sum of its proper divisors (187355513025).

218836323135 is a wasteful number, since it uses less digits than its factorization.

218836323135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40765 (or 40759 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The spelling of 218836323135 in words is "two hundred eighteen billion, eight hundred thirty-six million, three hundred twenty-three thousand, one hundred thirty-five".