818454454818 has 128 divisors (see below), whose sum is σ = 2224288733184. Its totient is φ = 193868467200.

The previous prime is 818454454787. The next prime is 818454454847.

818454454818 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×818454454818² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 322423 + ... + 1319418.

It is an arithmetic number, because the mean of its divisors is an integer number (17377255728).

Almost surely, 2^818454454818 is an apocalyptic number.

818454454818 is an abundant number, since it is smaller than the sum of its proper divisors (1405834278366).

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

818454454818 is a wasteful number, since it uses less digits than its factorization.

818454454818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641960.

The product of its digits is 26214400, while the sum is 60.

The spelling of 818454454818 in words is "eight hundred eighteen billion, four hundred fifty-four million, four hundred fifty-four thousand, eight hundred eighteen".