109265285809 has 9 divisors (see below), whose sum is σ = 112914261369. Its totient is φ = 105730682580.

The previous prime is 109265285791. The next prime is 109265285839. The reversal of 109265285809 is 908582562901.

The square root of 109265285809 is 330553.

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

It is not a de Polignac number, because 109265285809 - 2¹⁷ = 109265154737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 109265285809.

It is not an unprimeable number, because it can be changed into a prime (109265285839) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10241812 + ... + 10252474.

It is an arithmetic number, because the mean of its divisors is an integer number (12546029041).

Almost surely, 2^109265285809 is an apocalyptic number.

109265285809 is the 330553-rd square number.

109265285809 is the 165277-th centered octagonal number.

It is an amenable number.

109265285809 is a deficient number, since it is larger than the sum of its proper divisors (3648975560).

109265285809 is an frugal number, since it uses more digits than its factorization.

109265285809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21388 (or 10694 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 55.

The spelling of 109265285809 in words is "one hundred nine billion, two hundred sixty-five million, two hundred eighty-five thousand, eight hundred nine".