16859381109 has 8 divisors (see below), whose sum is σ = 22479847872. Its totient is φ = 11239250880.

The previous prime is 16859381057. The next prime is 16859381111. The reversal of 16859381109 is 90118395861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16859381109 - 2¹³ = 16859372917 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16859381509) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 76669 + ... + 198989.

It is an arithmetic number, because the mean of its divisors is an integer number (2809980984).

Almost surely, 2^16859381109 is an apocalyptic number.

It is an amenable number.

16859381109 is a deficient number, since it is larger than the sum of its proper divisors (5620466763).

16859381109 is a wasteful number, since it uses less digits than its factorization.

16859381109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168267.

The product of its (nonzero) digits is 466560, while the sum is 51.

The spelling of 16859381109 in words is "sixteen billion, eight hundred fifty-nine million, three hundred eighty-one thousand, one hundred nine".