808814671218 has 32 divisors (see below), whose sum is σ = 1891964145600. Its totient is φ = 255415159008.

The previous prime is 808814671213. The next prime is 808814671253. The reversal of 808814671218 is 812176418808.

808814671218 is a `hidden beast` number, since 80 + 8 + 81 + 467 + 1 + 21 + 8 = 666.

808814671218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×808814671218³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (808814671213) 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, 394158171 + ... + 394160222.

It is an arithmetic number, because the mean of its divisors is an integer number (59123879550).

Almost surely, 2^808814671218 is an apocalyptic number.

808814671218 is an abundant number, since it is smaller than the sum of its proper divisors (1083149474382).

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

808814671218 is a wasteful number, since it uses less digits than its factorization.

808814671218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788318423 (or 788318417 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 54.

The spelling of 808814671218 in words is "eight hundred eight billion, eight hundred fourteen million, six hundred seventy-one thousand, two hundred eighteen".