16434470809 has 9 divisors (see below), whose sum is σ = 17460386461. Its totient is φ = 15465686080.

The previous prime is 16434470797. The next prime is 16434470837. The reversal of 16434470809 is 90807443461.

The square root of 16434470809 is 128197.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 349129225 + 16085341584 = 18685^2 + 126828^2 .

It is not a de Polignac number, because 16434470809 - 2⁷ = 16434470681 is a prime.

It is a super-2 number, since 2×16434470809² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16434470309) 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 8 ways as a sum of consecutive naturals, for example, 2175579 + ... + 2183119.

Almost surely, 2^16434470809 is an apocalyptic number.

16434470809 is the 128197-th square number.

16434470809 is the 64099-th centered octagonal number.

It is an amenable number.

16434470809 is a deficient number, since it is larger than the sum of its proper divisors (1025915652).

16434470809 is an frugal number, since it uses more digits than its factorization.

16434470809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15116 (or 7558 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 16434470809 in words is "sixteen billion, four hundred thirty-four million, four hundred seventy thousand, eight hundred nine".