12808877556 has 12 divisors (see below), whose sum is σ = 29887380992. Its totient is φ = 4269625848.

The previous prime is 12808877533. The next prime is 12808877561. The reversal of 12808877556 is 65577880821.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 12808877496 and 12808877505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533703220 + ... + 533703243.

Almost surely, 2^12808877556 is an apocalyptic number.

It is an amenable number.

12808877556 is an abundant number, since it is smaller than the sum of its proper divisors (17078503436).

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

12808877556 is a wasteful number, since it uses less digits than its factorization.

12808877556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067406470 (or 1067406468 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 57.

The spelling of 12808877556 in words is "twelve billion, eight hundred eight million, eight hundred seventy-seven thousand, five hundred fifty-six".