9005452581 has 4 divisors (see below), whose sum is σ = 12007270112. Its totient is φ = 6003635052.

The previous prime is 9005452567. The next prime is 9005452723. The reversal of 9005452581 is 1852545009.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9005452581 - 2⁹ = 9005452069 is a prime.

It is a super-2 number, since 2×9005452581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9005452081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1500908761 + ... + 1500908766.

It is an arithmetic number, because the mean of its divisors is an integer number (3001817528).

Almost surely, 2^9005452581 is an apocalyptic number.

It is an amenable number.

9005452581 is a deficient number, since it is larger than the sum of its proper divisors (3001817531).

9005452581 is a wasteful number, since it uses less digits than its factorization.

9005452581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001817530.

The product of its (nonzero) digits is 72000, while the sum is 39.

The square root of 9005452581 is about 94897.0630788962. The cubic root of 9005452581 is about 2080.5038058612.

The spelling of 9005452581 in words is "nine billion, five million, four hundred fifty-two thousand, five hundred eighty-one".