13321621648 has 20 divisors (see below), whose sum is σ = 25813189120. Its totient is φ = 6660153504.

The previous prime is 13321621609. The next prime is 13321621667. The reversal of 13321621648 is 84612612331.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154261 + ... + 224587.

It is an arithmetic number, because the mean of its divisors is an integer number (1290659456).

Almost surely, 2^13321621648 is an apocalyptic number.

It is an amenable number.

13321621648 is a deficient number, since it is larger than the sum of its proper divisors (12491567472).

13321621648 is a wasteful number, since it uses less digits than its factorization.

13321621648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82174 (or 82168 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The spelling of 13321621648 in words is "thirteen billion, three hundred twenty-one million, six hundred twenty-one thousand, six hundred forty-eight".