11566475009 has 2 divisors, whose sum is σ = 11566475010. Its totient is φ = 11566475008.

The previous prime is 11566475003. The next prime is 11566475033. The reversal of 11566475009 is 90057466511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7458049600 + 4108425409 = 86360^2 + 64097^2 .

It is a cyclic number.

It is not a de Polignac number, because 11566475009 - 2⁴ = 11566474993 is a prime.

It is not a weakly prime, because it can be changed into another prime (11566475003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5783237504 + 5783237505.

It is an arithmetic number, because the mean of its divisors is an integer number (5783237505).

Almost surely, 2^11566475009 is an apocalyptic number.

It is an amenable number.

11566475009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11566475009 is an equidigital number, since it uses as much as digits as its factorization.

11566475009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 11566475009 in words is "eleven billion, five hundred sixty-six million, four hundred seventy-five thousand, nine".