3665873134609 has 9 divisors (see below), whose sum is σ = 4264398624891. Its totient is φ = 3142165484640.

The previous prime is 3665873134607. The next prime is 3665873134723. The reversal of 3665873134609 is 9064313785663.

The square root of 3665873134609 is 1914647.

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

It can be written as a sum of positive squares in only one way, i.e., 2741352424209 + 924520710400 = 1655703^2 + 961520^2 .

It is not a de Polignac number, because 3665873134609 - 2¹ = 3665873134607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3665873134607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13265769 + ... + 13539289.

Almost surely, 2^{3665873134609} is an apocalyptic number.

3665873134609 is the 1914647-th square number.

3665873134609 is the 957324-th centered octagonal number.

It is an amenable number.

3665873134609 is a deficient number, since it is larger than the sum of its proper divisors (598525490282).

3665873134609 is an frugal number, since it uses more digits than its factorization.

3665873134609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547056 (or 273528 counting only the distinct ones).

The product of its (nonzero) digits is 58786560, while the sum is 61.

The spelling of 3665873134609 in words is "three trillion, six hundred sixty-five billion, eight hundred seventy-three million, one hundred thirty-four thousand, six hundred nine".