12646221551327 has 16 divisors (see below), whose sum is σ = 15710043750912. Its totient is φ = 9912289494240.

The previous prime is 12646221551281. The next prime is 12646221551363. The reversal of 12646221551327 is 72315512264621.

It is not a de Polignac number, because 12646221551327 - 2³² = 12641926584031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12646221553327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 649380299 + ... + 649399772.

It is an arithmetic number, because the mean of its divisors is an integer number (981877734432).

Almost surely, 2^{12646221551327} is an apocalyptic number.

12646221551327 is a deficient number, since it is larger than the sum of its proper divisors (3063822199585).

12646221551327 is a wasteful number, since it uses less digits than its factorization.

12646221551327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298780198.

The product of its digits is 1209600, while the sum is 47.

The spelling of 12646221551327 in words is "twelve trillion, six hundred forty-six billion, two hundred twenty-one million, five hundred fifty-one thousand, three hundred twenty-seven".