918819918819 has 48 divisors (see below), whose sum is σ = 1462477711968. Its totient is φ = 551232000000.

The previous prime is 918819918811. The next prime is 918819918839.

918819918819 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 918819918819 - 2³ = 918819918811 is a prime.

It is a super-2 number, since 2×918819918819² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (918819918811) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92795769 + ... + 92805669.

It is an arithmetic number, because the mean of its divisors is an integer number (30468285666).

Almost surely, 2^918819918819 is an apocalyptic number.

918819918819 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

918819918819 is a deficient number, since it is larger than the sum of its proper divisors (543657793149).

918819918819 is a wasteful number, since it uses less digits than its factorization.

918819918819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19300 (or 19297 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 72.

The spelling of 918819918819 in words is "nine hundred eighteen billion, eight hundred nineteen million, nine hundred eighteen thousand, eight hundred nineteen".