216679455318 has 16 divisors (see below), whose sum is σ = 433368428400. Its totient is φ = 72224898816.

The previous prime is 216679455281. The next prime is 216679455337. The reversal of 216679455318 is 813554976612.

It is a super-2 number, since 2×216679455318² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81343 + ... + 663306.

It is an arithmetic number, because the mean of its divisors is an integer number (27085526775).

Almost surely, 2^216679455318 is an apocalyptic number.

216679455318 is an abundant number, since it is smaller than the sum of its proper divisors (216688973082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216679455318 is a wasteful number, since it uses less digits than its factorization.

216679455318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793151.

The product of its digits is 10886400, while the sum is 57.

The spelling of 216679455318 in words is "two hundred sixteen billion, six hundred seventy-nine million, four hundred fifty-five thousand, three hundred eighteen".