16465351909 has 4 divisors (see below), whose sum is σ = 16866945900. Its totient is φ = 16063757920.

The previous prime is 16465351883. The next prime is 16465351913. The reversal of 16465351909 is 90915356461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5361461284 + 11103890625 = 73222^2 + 105375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16465351909 is a prime.

It is a super-2 number, since 2×16465351909² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16465355909) 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 3 ways as a sum of consecutive naturals, for example, 200796934 + ... + 200797015.

It is an arithmetic number, because the mean of its divisors is an integer number (4216736475).

Almost surely, 2^16465351909 is an apocalyptic number.

It is an amenable number.

16465351909 is a deficient number, since it is larger than the sum of its proper divisors (401593991).

16465351909 is an equidigital number, since it uses as much as digits as its factorization.

16465351909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401593990.

The product of its (nonzero) digits is 874800, while the sum is 49.

The spelling of 16465351909 in words is "sixteen billion, four hundred sixty-five million, three hundred fifty-one thousand, nine hundred nine".