12128847665 has 8 divisors (see below), whose sum is σ = 15877764288. Its totient is φ = 8820980080.

The previous prime is 12128847631. The next prime is 12128847713. The reversal of 12128847665 is 56674882121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12128847665 - 2¹⁰ = 12128846641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 110262197 + ... + 110262306.

It is an arithmetic number, because the mean of its divisors is an integer number (1984720536).

Almost surely, 2^12128847665 is an apocalyptic number.

It is an amenable number.

12128847665 is a deficient number, since it is larger than the sum of its proper divisors (3748916623).

12128847665 is a wasteful number, since it uses less digits than its factorization.

12128847665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220524519.

The product of its digits is 1290240, while the sum is 50.

The spelling of 12128847665 in words is "twelve billion, one hundred twenty-eight million, eight hundred forty-seven thousand, six hundred sixty-five".