12648121665173 has 16 divisors (see below), whose sum is σ = 13120490472960. Its totient is φ = 12179835604800.

The previous prime is 12648121665169. The next prime is 12648121665217. The reversal of 12648121665173 is 37156612184621.

It is a cyclic number.

It is not a de Polignac number, because 12648121665173 - 2² = 12648121665169 is a prime.

It is a super-2 number, since 2×12648121665173² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12648121665103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12187403 + ... + 13184423.

It is an arithmetic number, because the mean of its divisors is an integer number (820030654560).

Almost surely, 2^{12648121665173} is an apocalyptic number.

It is an amenable number.

12648121665173 is a deficient number, since it is larger than the sum of its proper divisors (472368807787).

12648121665173 is a wasteful number, since it uses less digits than its factorization.

12648121665173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999068.

The product of its digits is 2903040, while the sum is 53.

The spelling of 12648121665173 in words is "twelve trillion, six hundred forty-eight billion, one hundred twenty-one million, six hundred sixty-five thousand, one hundred seventy-three".