17804365489 has 27 divisors (see below), whose sum is σ = 19440667243. Its totient is φ = 16302310208.

The previous prime is 17804365487. The next prime is 17804365499. The reversal of 17804365489 is 98456340871.

The square root of 17804365489 is 133433.

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., 13861530225 + 3942835264 = 117735^2 + 62792^2 .

It is not a de Polignac number, because 17804365489 - 2¹ = 17804365487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17804365487) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 106612884 + ... + 106613050.

Almost surely, 2^17804365489 is an apocalyptic number.

17804365489 is the 133433-rd square number.

17804365489 is the 66717-th centered octagonal number.

It is an amenable number.

17804365489 is a deficient number, since it is larger than the sum of its proper divisors (1636301754).

17804365489 is an frugal number, since it uses more digits than its factorization.

17804365489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 17804365489 in words is "seventeen billion, eight hundred four million, three hundred sixty-five thousand, four hundred eighty-nine".