218197489173 has 16 divisors (see below), whose sum is σ = 304428734976. Its totient is φ = 138844177920.

The previous prime is 218197489141. The next prime is 218197489207. The reversal of 218197489173 is 371984791812.

It is not a de Polignac number, because 218197489173 - 2⁵ = 218197489141 is a prime.

It is a super-2 number, since 2×218197489173² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218197489373) 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, 16063140 + ... + 16076717.

It is an arithmetic number, because the mean of its divisors is an integer number (19026795936).

Almost surely, 2^218197489173 is an apocalyptic number.

It is an amenable number.

218197489173 is a deficient number, since it is larger than the sum of its proper divisors (86231245803).

218197489173 is a wasteful number, since it uses less digits than its factorization.

218197489173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32139964.

The product of its digits is 6096384, while the sum is 60.

The spelling of 218197489173 in words is "two hundred eighteen billion, one hundred ninety-seven million, four hundred eighty-nine thousand, one hundred seventy-three".