12805116328 has 8 divisors (see below), whose sum is σ = 24009593130. Its totient is φ = 6402558160.

The previous prime is 12805116323. The next prime is 12805116343. The reversal of 12805116328 is 82361150821.

It can be written as a sum of positive squares in only one way, i.e., 11650611844 + 1154504484 = 107938^2 + 33978^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×12805116328³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (12805116323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800319763 + ... + 800319778.

Almost surely, 2^12805116328 is an apocalyptic number.

It is an amenable number.

12805116328 is a deficient number, since it is larger than the sum of its proper divisors (11204476802).

12805116328 is a wasteful number, since it uses less digits than its factorization.

12805116328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600639547 (or 1600639543 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 12805116328 in words is "twelve billion, eight hundred five million, one hundred sixteen thousand, three hundred twenty-eight".