12816928444 has 12 divisors (see below), whose sum is σ = 22432594968. Its totient is φ = 6407615600.

The previous prime is 12816928433. The next prime is 12816928463. The reversal of 12816928444 is 44482961821.

It is a super-2 number, since 2×12816928444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 177547 + ... + 239074.

It is an arithmetic number, because the mean of its divisors is an integer number (1869382914).

Almost surely, 2^12816928444 is an apocalyptic number.

It is an amenable number.

12816928444 is a deficient number, since it is larger than the sum of its proper divisors (9615666524).

12816928444 is a wasteful number, since it uses less digits than its factorization.

12816928444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424316 (or 424314 counting only the distinct ones).

The product of its digits is 884736, while the sum is 49.

The spelling of 12816928444 in words is "twelve billion, eight hundred sixteen million, nine hundred twenty-eight thousand, four hundred forty-four".