1809909529343 has 4 divisors (see below), whose sum is σ = 1811026069848. Its totient is φ = 1808792988840.

The previous prime is 1809909529247. The next prime is 1809909529381. The reversal of 1809909529343 is 3439259099081.

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

It is a cyclic number.

It is not a de Polignac number, because 1809909529343 - 2¹⁰ = 1809909528319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1809909559343) 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, 558267821 + ... + 558271062.

It is an arithmetic number, because the mean of its divisors is an integer number (452756517462).

Almost surely, 2^{1809909529343} is an apocalyptic number.

1809909529343 is a deficient number, since it is larger than the sum of its proper divisors (1116540505).

1809909529343 is a wasteful number, since it uses less digits than its factorization.

1809909529343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116540504.

The product of its (nonzero) digits is 18895680, while the sum is 62.

The spelling of 1809909529343 in words is "one trillion, eight hundred nine billion, nine hundred nine million, five hundred twenty-nine thousand, three hundred forty-three".