6405281089 has 9 divisors (see below), whose sum is σ = 6457971009. Its totient is φ = 6353019540.

The previous prime is 6405281087. The next prime is 6405281093. The reversal of 6405281089 is 9801825046.

It is a happy number.

The square root of 6405281089 is 80033.

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

It is not a de Polignac number, because 6405281089 - 2¹ = 6405281087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6405281081) 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, 13045134 + ... + 13045624.

Almost surely, 2^6405281089 is an apocalyptic number.

6405281089 is the 80033-rd square number.

6405281089 is the 40017-th centered octagonal number.

It is an amenable number.

6405281089 is a deficient number, since it is larger than the sum of its proper divisors (52689920).

6405281089 is an frugal number, since it uses more digits than its factorization.

6405281089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The cubic root of 6405281089 is about 1857.1460731212.

The spelling of 6405281089 in words is "six billion, four hundred five million, two hundred eighty-one thousand, eighty-nine".