12872221641663 has 4 divisors (see below), whose sum is σ = 17162962188888. Its totient is φ = 8581481094440.

The previous prime is 12872221641613. The next prime is 12872221641667. The reversal of 12872221641663 is 36614612227821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12872221641663 - 2²¹ = 12872219544511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12872221641667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2145370273608 + ... + 2145370273613.

It is an arithmetic number, because the mean of its divisors is an integer number (4290740547222).

Almost surely, 2^{12872221641663} is an apocalyptic number.

12872221641663 is a deficient number, since it is larger than the sum of its proper divisors (4290740547225).

12872221641663 is an equidigital number, since it uses as much as digits as its factorization.

12872221641663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290740547224.

The product of its digits is 2322432, while the sum is 51.

The spelling of 12872221641663 in words is "twelve trillion, eight hundred seventy-two billion, two hundred twenty-one million, six hundred forty-one thousand, six hundred sixty-three".