1109573609769 has 9 divisors (see below), whose sum is σ = 1602722000919. Its totient is φ = 739713633120.

The previous prime is 1109573609719. The next prime is 1109573609777. The reversal of 1109573609769 is 9679063759011.

The square root of 1109573609769 is 1053363.

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

1109573609769 is a `hidden beast` number, since 1 + 10 + 9 + 5 + 7 + 3 + 609 + 7 + 6 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 263541569769 + 846032040000 = 513363^2 + 919800^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1109573609769 - 2¹¹ = 1109573607721 is a prime.

It is a super-2 number, since 2×1109573609769² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1109573609719) 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, 2984529 + ... + 3335649.

Almost surely, 2^{1109573609769} is an apocalyptic number.

1109573609769 is the 1053363-rd square number.

1109573609769 is the 526682-nd centered octagonal number.

It is an amenable number.

1109573609769 is a deficient number, since it is larger than the sum of its proper divisors (493148391150).

1109573609769 is an frugal number, since it uses more digits than its factorization.

1109573609769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702248 (or 351124 counting only the distinct ones).

The product of its (nonzero) digits is 19289340, while the sum is 63.

The spelling of 1109573609769 in words is "one trillion, one hundred nine billion, five hundred seventy-three million, six hundred nine thousand, seven hundred sixty-nine".