16991560265 has 8 divisors (see below), whose sum is σ = 21589276680. Its totient is φ = 12793645312.

The previous prime is 16991560193. The next prime is 16991560301. The reversal of 16991560265 is 56206519961.

It is a happy number.

16991560265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1659177289 + 15332382976 = 40733^2 + 123824^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16991560265 - 2¹⁰ = 16991559241 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99950270 + ... + 99950439.

It is an arithmetic number, because the mean of its divisors is an integer number (2698659585).

Almost surely, 2^16991560265 is an apocalyptic number.

It is an amenable number.

16991560265 is a deficient number, since it is larger than the sum of its proper divisors (4597716415).

16991560265 is a wasteful number, since it uses less digits than its factorization.

16991560265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199900731.

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

The spelling of 16991560265 in words is "sixteen billion, nine hundred ninety-one million, five hundred sixty thousand, two hundred sixty-five".