11709009571 has 12 divisors (see below), whose sum is σ = 13642724280. Its totient is φ = 10020054240.

The previous prime is 11709009527. The next prime is 11709009589. The reversal of 11709009571 is 17590090711.

It is a de Polignac number, because none of the positive numbers 2^k-11709009571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11709009271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162690 + ... + 223351.

It is an arithmetic number, because the mean of its divisors is an integer number (1136893690).

Almost surely, 2^11709009571 is an apocalyptic number.

11709009571 is a deficient number, since it is larger than the sum of its proper divisors (1933714709).

11709009571 is an equidigital number, since it uses as much as digits as its factorization.

11709009571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386674 (or 386667 counting only the distinct ones).

The product of its (nonzero) digits is 19845, while the sum is 40.

The spelling of 11709009571 in words is "eleven billion, seven hundred nine million, nine thousand, five hundred seventy-one".