16965085809 has 24 divisors (see below), whose sum is σ = 26351431968. Its totient is φ = 9680247360.

The previous prime is 16965085777. The next prime is 16965085871. The reversal of 16965085809 is 90858056961.

It is not a de Polignac number, because 16965085809 - 2⁵ = 16965085777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16965083809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18069 + ... + 185085.

It is an arithmetic number, because the mean of its divisors is an integer number (1097976332).

Almost surely, 2^16965085809 is an apocalyptic number.

It is an amenable number.

16965085809 is a deficient number, since it is larger than the sum of its proper divisors (9386346159).

16965085809 is a wasteful number, since it uses less digits than its factorization.

16965085809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167725 (or 167718 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 57.

The spelling of 16965085809 in words is "sixteen billion, nine hundred sixty-five million, eighty-five thousand, eight hundred nine".