16109109 has 12 divisors (see below), whose sum is σ = 23764416. Its totient is φ = 10510632.

The previous prime is 16109101. The next prime is 16109113. The reversal of 16109109 is 90190161.

It is not a de Polignac number, because 16109109 - 2³ = 16109101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16109101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18619 + ... + 19464.

It is an arithmetic number, because the mean of its divisors is an integer number (1980368).

Almost surely, 2^16109109 is an apocalyptic number.

It is an amenable number.

16109109 is a deficient number, since it is larger than the sum of its proper divisors (7655307).

16109109 is a wasteful number, since it uses less digits than its factorization.

16109109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38136 (or 38133 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 16109109 is about 4013.6154524319. The cubic root of 16109109 is about 252.5556992439. Note that the first 3 decimals are identical.

The spelling of 16109109 in words is "sixteen million, one hundred nine thousand, one hundred nine".