16269809665 has 8 divisors (see below), whose sum is σ = 19791220968. Its totient is φ = 12837548160.

The previous prime is 16269809663. The next prime is 16269809669. The reversal of 16269809665 is 56690896261.

It can be written as a sum of positive squares in 4 ways, for example, as 8714304 + 16261095361 = 2952^2 + 127519^2 .

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

It is not a de Polignac number, because 16269809665 - 2¹ = 16269809663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16269809663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22287046 + ... + 22287775.

It is an arithmetic number, because the mean of its divisors is an integer number (2473902621).

Almost surely, 2^16269809665 is an apocalyptic number.

It is an amenable number.

16269809665 is a deficient number, since it is larger than the sum of its proper divisors (3521411303).

16269809665 is an equidigital number, since it uses as much as digits as its factorization.

16269809665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44574899.

The product of its (nonzero) digits is 8398080, while the sum is 58.

The spelling of 16269809665 in words is "sixteen billion, two hundred sixty-nine million, eight hundred nine thousand, six hundred sixty-five".