16306453409 has 4 divisors (see below), whose sum is σ = 16747168404. Its totient is φ = 15865738416.

The previous prime is 16306453403. The next prime is 16306453433. The reversal of 16306453409 is 90435460361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90435460361 = 46051 ⋅1963811.

It can be written as a sum of positive squares in 2 ways, for example, as 7756677184 + 8549776225 = 88072^2 + 92465^2 .

It is a cyclic number.

It is not a de Polignac number, because 16306453409 - 2⁴ = 16306453393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16306453403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220357442 + ... + 220357515.

It is an arithmetic number, because the mean of its divisors is an integer number (4186792101).

Almost surely, 2^16306453409 is an apocalyptic number.

It is an amenable number.

16306453409 is a deficient number, since it is larger than the sum of its proper divisors (440714995).

16306453409 is an equidigital number, since it uses as much as digits as its factorization.

16306453409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440714994.

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 16306453409 in words is "sixteen billion, three hundred six million, four hundred fifty-three thousand, four hundred nine".