12818385952516 has 24 divisors (see below), whose sum is σ = 22647849602840. Its totient is φ = 6347623076352.

The previous prime is 12818385952511. The next prime is 12818385952529. The reversal of 12818385952516 is 61525958381821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 796563390016 + 12021822562500 = 892504^2 + 3467250^2 .

It is a super-2 number, since 2×12818385952516² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12818385952511) 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, 5411061 + ... + 7410556.

Almost surely, 2^{12818385952516} is an apocalyptic number.

It is an amenable number.

12818385952516 is a deficient number, since it is larger than the sum of its proper divisors (9829463650324).

12818385952516 is a wasteful number, since it uses less digits than its factorization.

12818385952516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12824023 (or 12824021 counting only the distinct ones).

The product of its digits is 41472000, while the sum is 64.

The spelling of 12818385952516 in words is "twelve trillion, eight hundred eighteen billion, three hundred eighty-five million, nine hundred fifty-two thousand, five hundred sixteen".