16989169444605 has 24 divisors (see below), whose sum is σ = 29452903159680. Its totient is φ = 9059348999520.

The previous prime is 16989169444579. The next prime is 16989169444627. The reversal of 16989169444605 is 50644496198961.

It is a happy number.

16989169444605 is a `hidden beast` number, since 1 + 6 + 9 + 8 + 9 + 1 + 6 + 9 + 4 + 4 + 4 + 605 = 666.

It is not a de Polignac number, because 16989169444605 - 2¹³ = 16989169436413 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31844401 + ... + 32373510.

It is an arithmetic number, because the mean of its divisors is an integer number (1227204298320).

Almost surely, 2^{16989169444605} is an apocalyptic number.

16989169444605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16989169444605 is a deficient number, since it is larger than the sum of its proper divisors (12463733715075).

16989169444605 is a wasteful number, since it uses less digits than its factorization.

16989169444605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64223801 (or 64223798 counting only the distinct ones).

The product of its (nonzero) digits is 403107840, while the sum is 72.

The spelling of 16989169444605 in words is "sixteen trillion, nine hundred eighty-nine billion, one hundred sixty-nine million, four hundred forty-four thousand, six hundred five".