12989591556 has 24 divisors (see below), whose sum is σ = 30323184864. Its totient is φ = 4327844160.

The previous prime is 12989591543. The next prime is 12989591599. The reversal of 12989591556 is 65519598921.

It is a super-2 number, since 2×12989591556² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12989591556.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225550 + ... + 277221.

It is an arithmetic number, because the mean of its divisors is an integer number (1263466036).

Almost surely, 2^12989591556 is an apocalyptic number.

It is an amenable number.

12989591556 is an abundant number, since it is smaller than the sum of its proper divisors (17333593308).

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

12989591556 is a wasteful number, since it uses less digits than its factorization.

12989591556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504931 (or 504929 counting only the distinct ones).

The product of its digits is 8748000, while the sum is 60.

The spelling of 12989591556 in words is "twelve billion, nine hundred eighty-nine million, five hundred ninety-one thousand, five hundred fifty-six".