12864221276 has 24 divisors (see below), whose sum is σ = 22806040320. Its totient is φ = 6348272112.

The previous prime is 12864221267. The next prime is 12864221297. The reversal of 12864221276 is 67212246821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1051571 + ... + 1063733.

It is an arithmetic number, because the mean of its divisors is an integer number (950251680).

Almost surely, 2^12864221276 is an apocalyptic number.

It is an amenable number.

12864221276 is a deficient number, since it is larger than the sum of its proper divisors (9941819044).

12864221276 is a wasteful number, since it uses less digits than its factorization.

12864221276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15593 (or 15591 counting only the distinct ones).

The product of its digits is 129024, while the sum is 41.

The spelling of 12864221276 in words is "twelve billion, eight hundred sixty-four million, two hundred twenty-one thousand, two hundred seventy-six".