218812814385 has 32 divisors (see below), whose sum is σ = 402029291520. Its totient is φ = 100507320000.

The previous prime is 218812814383. The next prime is 218812814401. The reversal of 218812814385 is 583418218812.

It is not a de Polignac number, because 218812814385 - 2¹ = 218812814383 is a prime.

It is a super-3 number, since 3×218812814385³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (218812814383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34895241 + ... + 34901510.

It is an arithmetic number, because the mean of its divisors is an integer number (12563415360).

Almost surely, 2^218812814385 is an apocalyptic number.

It is an amenable number.

218812814385 is a deficient number, since it is larger than the sum of its proper divisors (183216477135).

218812814385 is a wasteful number, since it uses less digits than its factorization.

218812814385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69796789.

The product of its digits is 983040, while the sum is 51.

The spelling of 218812814385 in words is "two hundred eighteen billion, eight hundred twelve million, eight hundred fourteen thousand, three hundred eighty-five".