16434135409 has 4 divisors (see below), whose sum is σ = 16435266804. Its totient is φ = 16433004016.

The previous prime is 16434135359. The next prime is 16434135437. The reversal of 16434135409 is 90453143461.

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 7819511184 + 8614624225 = 88428^2 + 92815^2 .

It is a cyclic number.

It is not a de Polignac number, because 16434135409 - 2⁹ = 16434134897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16434135209) 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, 543622 + ... + 573055.

It is an arithmetic number, because the mean of its divisors is an integer number (4108816701).

Almost surely, 2^16434135409 is an apocalyptic number.

It is an amenable number.

16434135409 is a deficient number, since it is larger than the sum of its proper divisors (1131395).

16434135409 is a wasteful number, since it uses less digits than its factorization.

16434135409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131394.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 16434135409 in words is "sixteen billion, four hundred thirty-four million, one hundred thirty-five thousand, four hundred nine".