12815334836 has 12 divisors (see below), whose sum is σ = 22734053412. Its totient is φ = 6319891008.

The previous prime is 12815334809. The next prime is 12815334839. The reversal of 12815334836 is 63843351821.

It can be written as a sum of positive squares in 2 ways, for example, as 10981782436 + 1833552400 = 104794^2 + 42820^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12815334839) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21943775 + ... + 21944358.

It is an arithmetic number, because the mean of its divisors is an integer number (1894504451).

Almost surely, 2^12815334836 is an apocalyptic number.

It is an amenable number.

12815334836 is a deficient number, since it is larger than the sum of its proper divisors (9918718576).

12815334836 is a wasteful number, since it uses less digits than its factorization.

12815334836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43888210 (or 43888208 counting only the distinct ones).

The product of its digits is 414720, while the sum is 44.

The spelling of 12815334836 in words is "twelve billion, eight hundred fifteen million, three hundred thirty-four thousand, eight hundred thirty-six".