11659697909 has 16 divisors (see below), whose sum is σ = 12318842880. Its totient is φ = 11005196400.

The previous prime is 11659697899. The next prime is 11659697923. The reversal of 11659697909 is 90979695611.

It is a cyclic number.

It is not a de Polignac number, because 11659697909 - 2⁴ = 11659697893 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 (11659697939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10129484 + ... + 10130634.

It is an arithmetic number, because the mean of its divisors is an integer number (769927680).

Almost surely, 2^11659697909 is an apocalyptic number.

11659697909 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11659697909 is a deficient number, since it is larger than the sum of its proper divisors (659144971).

11659697909 is a wasteful number, since it uses less digits than its factorization.

11659697909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2680.

The product of its (nonzero) digits is 8266860, while the sum is 62.

The spelling of 11659697909 in words is "eleven billion, six hundred fifty-nine million, six hundred ninety-seven thousand, nine hundred nine".