16446782856385 has 16 divisors (see below), whose sum is σ = 23536265654016. Its totient is φ = 10787455090368.

The previous prime is 16446782856253. The next prime is 16446782856391. The reversal of 16446782856385 is 58365828764461.

16446782856385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 16446782856385 - 2²⁹ = 16446245985473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10215392274 + ... + 10215393883.

It is an arithmetic number, because the mean of its divisors is an integer number (1471016603376).

Almost surely, 2^{16446782856385} is an apocalyptic number.

It is an amenable number.

16446782856385 is a deficient number, since it is larger than the sum of its proper divisors (7089482797631).

16446782856385 is a wasteful number, since it uses less digits than its factorization.

16446782856385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20430786192.

The product of its digits is 1857945600, while the sum is 73.

The spelling of 16446782856385 in words is "sixteen trillion, four hundred forty-six billion, seven hundred eighty-two million, eight hundred fifty-six thousand, three hundred eighty-five".