17149123209 has 16 divisors (see below), whose sum is σ = 22932854784. Its totient is φ = 11399110800.

The previous prime is 17149123207. The next prime is 17149123223. The reversal of 17149123209 is 90232194171.

It is not a de Polignac number, because 17149123209 - 2¹ = 17149123207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (17149123207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2094694 + ... + 2102864.

It is an arithmetic number, because the mean of its divisors is an integer number (1433303424).

Almost surely, 2^17149123209 is an apocalyptic number.

It is an amenable number.

17149123209 is a deficient number, since it is larger than the sum of its proper divisors (5783731575).

17149123209 is a wasteful number, since it uses less digits than its factorization.

17149123209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10148.

The product of its (nonzero) digits is 27216, while the sum is 39.

The spelling of 17149123209 in words is "seventeen billion, one hundred forty-nine million, one hundred twenty-three thousand, two hundred nine".