16616205959 has 16 divisors (see below), whose sum is σ = 17466501120. Its totient is φ = 15793371360.

The previous prime is 16616205953. The next prime is 16616205967. The reversal of 16616205959 is 95950261661.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16616205959 - 2²⁴ = 16599428743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16616205953) 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, 189812 + ... + 263174.

It is an arithmetic number, because the mean of its divisors is an integer number (1091656320).

Almost surely, 2^16616205959 is an apocalyptic number.

16616205959 is a deficient number, since it is larger than the sum of its proper divisors (850295161).

16616205959 is an equidigital number, since it uses as much as digits as its factorization.

16616205959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73550.

The product of its (nonzero) digits is 874800, while the sum is 50.

The spelling of 16616205959 in words is "sixteen billion, six hundred sixteen million, two hundred five thousand, nine hundred fifty-nine".