1089573565 has 8 divisors (see below), whose sum is σ = 1339378488. Its totient is φ = 850398720.

The previous prime is 1089573547. The next prime is 1089573593. The reversal of 1089573565 is 5653759801.

It can be written as a sum of positive squares in 4 ways, for example, as 18844281 + 1070729284 = 4341^2 + 32722^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1089573565 - 2⁹ = 1089573053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2657292 + ... + 2657701.

It is an arithmetic number, because the mean of its divisors is an integer number (167422311).

Almost surely, 2^1089573565 is an apocalyptic number.

It is an amenable number.

1089573565 is a deficient number, since it is larger than the sum of its proper divisors (249804923).

1089573565 is an equidigital number, since it uses as much as digits as its factorization.

1089573565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5315039.

The product of its (nonzero) digits is 1134000, while the sum is 49.

The square root of 1089573565 is about 33008.6892348060. The cubic root of 1089573565 is about 1029.0082403906.

The spelling of 1089573565 in words is "one billion, eighty-nine million, five hundred seventy-three thousand, five hundred sixty-five".