16434425565 has 12 divisors (see below), whose sum is σ = 28486337724. Its totient is φ = 8765026944.

The previous prime is 16434425561. The next prime is 16434425621. The reversal of 16434425565 is 56552443461.

16434425565 is a `hidden beast` number, since 1 + 6 + 43 + 4 + 42 + 5 + 565 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12362326596 + 4072098969 = 111186^2 + 63813^2 .

It is not a de Polignac number, because 16434425565 - 2² = 16434425561 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 365209457 = 16434425565 / (1 + 6 + 4 + 3 + 4 + 4 + 2 + 5 + 5 + 6 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16434425565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16434425561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182604684 + ... + 182604773.

It is an arithmetic number, because the mean of its divisors is an integer number (2373861477).

Almost surely, 2^16434425565 is an apocalyptic number.

16434425565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16434425565 is a deficient number, since it is larger than the sum of its proper divisors (12051912159).

16434425565 is a wasteful number, since it uses less digits than its factorization.

16434425565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365209468 (or 365209465 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 45.

The spelling of 16434425565 in words is "sixteen billion, four hundred thirty-four million, four hundred twenty-five thousand, five hundred sixty-five".