80559909 has 12 divisors (see below), whose sum is σ = 116443756. Its totient is φ = 53669952.

The previous prime is 80559907. The next prime is 80559967. The reversal of 80559909 is 90995508.

80559909 is a `hidden beast` number, since 8 + 0 + 559 + 90 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 40832100 + 39727809 = 6390^2 + 6303^2 .

It is not a de Polignac number, because 80559909 - 2¹ = 80559907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80559901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20097 + ... + 23769.

Almost surely, 2^80559909 is an apocalyptic number.

It is an amenable number.

80559909 is a deficient number, since it is larger than the sum of its proper divisors (35883847).

80559909 is a wasteful number, since it uses less digits than its factorization.

80559909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6116 (or 6113 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 45.

The square root of 80559909 is about 8975.5171995824. The cubic root of 80559909 is about 431.8898413825.

The spelling of 80559909 in words is "eighty million, five hundred fifty-nine thousand, nine hundred nine".