16444803657609 has 24 divisors (see below), whose sum is σ = 24306756714240. Its totient is φ = 10707917344992.

The previous prime is 16444803657587. The next prime is 16444803657647. The reversal of 16444803657609 is 90675630844461.

16444803657609 is a `hidden beast` number, since 1 + 6 + 44 + 480 + 3 + 6 + 57 + 60 + 9 = 666.

It is not a de Polignac number, because 16444803657609 - 2⁵ = 16444803657577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16444803653609) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12382632 + ... + 13646214.

It is an arithmetic number, because the mean of its divisors is an integer number (1012781529760).

Almost surely, 2^{16444803657609} is an apocalyptic number.

It is an amenable number.

16444803657609 is a deficient number, since it is larger than the sum of its proper divisors (7861953056631).

16444803657609 is a wasteful number, since it uses less digits than its factorization.

16444803657609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297261 (or 1297258 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 63.

The spelling of 16444803657609 in words is "sixteen trillion, four hundred forty-four billion, eight hundred three million, six hundred fifty-seven thousand, six hundred nine".