12644217177 has 16 divisors (see below), whose sum is σ = 17874294912. Its totient is φ = 7923121920.

The previous prime is 12644217167. The next prime is 12644217197. The reversal of 12644217177 is 77171244621.

It is a happy number.

It is not a de Polignac number, because 12644217177 - 2⁴ = 12644217161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12644217137) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 125149 + ... + 202362.

It is an arithmetic number, because the mean of its divisors is an integer number (1117143432).

Almost surely, 2^12644217177 is an apocalyptic number.

12644217177 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12644217177 is a deficient number, since it is larger than the sum of its proper divisors (5230077735).

12644217177 is a wasteful number, since it uses less digits than its factorization.

12644217177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328288.

The product of its digits is 131712, while the sum is 42.

The spelling of 12644217177 in words is "twelve billion, six hundred forty-four million, two hundred seventeen thousand, one hundred seventy-seven".