11701172009 has 8 divisors (see below), whose sum is σ = 11756565000. Its totient is φ = 11645816832.

The previous prime is 11701172003. The next prime is 11701172017. The reversal of 11701172009 is 90027110711.

It can be written as a sum of positive squares in 4 ways, for example, as 2808682009 + 8892490000 = 52997^2 + 94300^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11701172009 - 2²⁰ = 11700123433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11701172003) 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 7 ways as a sum of consecutive naturals, for example, 754667 + ... + 770015.

It is an arithmetic number, because the mean of its divisors is an integer number (1469570625).

Almost surely, 2^11701172009 is an apocalyptic number.

It is an amenable number.

11701172009 is a deficient number, since it is larger than the sum of its proper divisors (55392991).

11701172009 is a wasteful number, since it uses less digits than its factorization.

11701172009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18907.

The product of its (nonzero) digits is 882, while the sum is 29.

The spelling of 11701172009 in words is "eleven billion, seven hundred one million, one hundred seventy-two thousand, nine".