818744707447818 has 16 divisors (see below), whose sum is σ = 1652793054288480. Its totient is φ = 270364295917136.

The previous prime is 818744707447813. The next prime is 818744707447861.

818744707447818 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×818744707447818² (a number of 31 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (818744707447813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 637651640673 + ... + 637651641956.

It is an arithmetic number, because the mean of its divisors is an integer number (103299565893030).

Almost surely, 2^{818744707447818} is an apocalyptic number.

818744707447818 is an abundant number, since it is smaller than the sum of its proper divisors (834048346840662).

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

818744707447818 is a wasteful number, since it uses less digits than its factorization.

818744707447818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275303282741.

The product of its (nonzero) digits is 2517630976, while the sum is 78.

The spelling of 818744707447818 in words is "eight hundred eighteen trillion, seven hundred forty-four billion, seven hundred seven million, four hundred forty-seven thousand, eight hundred eighteen".