12989028261 has 12 divisors (see below), whose sum is σ = 19036262336. Its totient is φ = 7872138120.

The previous prime is 12989028253. The next prime is 12989028271. The reversal of 12989028261 is 16282098921.

12989028261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12989028261 - 2³ = 12989028253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12989028261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12989028271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17890861 + ... + 17891586.

Almost surely, 2^12989028261 is an apocalyptic number.

12989028261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12989028261 is a deficient number, since it is larger than the sum of its proper divisors (6047234075).

12989028261 is a wasteful number, since it uses less digits than its factorization.

12989028261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35782472 (or 35782461 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 48.

The spelling of 12989028261 in words is "twelve billion, nine hundred eighty-nine million, twenty-eight thousand, two hundred sixty-one".