12644203165305 has 8 divisors (see below), whose sum is σ = 20230725064512. Its totient is φ = 6743575021488.

The previous prime is 12644203165301. The next prime is 12644203165327. The reversal of 12644203165305 is 50356130244621.

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

It is not a de Polignac number, because 12644203165305 - 2² = 12644203165301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12644203165301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421473438829 + ... + 421473438858.

It is an arithmetic number, because the mean of its divisors is an integer number (2528840633064).

Almost surely, 2^{12644203165305} is an apocalyptic number.

12644203165305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12644203165305 is a deficient number, since it is larger than the sum of its proper divisors (7586521899207).

12644203165305 is an equidigital number, since it uses as much as digits as its factorization.

12644203165305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842946877695.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 12644203165305 in words is "twelve trillion, six hundred forty-four billion, two hundred three million, one hundred sixty-five thousand, three hundred five".