11915719717 has 8 divisors (see below), whose sum is σ = 13683123360. Its totient is φ = 10262342160.

The previous prime is 11915719693. The next prime is 11915719757. The reversal of 11915719717 is 71791751911.

11915719717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11915719717 - 2⁷ = 11915719589 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 (11915719757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28506298 + ... + 28506715.

It is an arithmetic number, because the mean of its divisors is an integer number (1710390420).

Almost surely, 2^11915719717 is an apocalyptic number.

It is an amenable number.

11915719717 is a deficient number, since it is larger than the sum of its proper divisors (1767403643).

11915719717 is a wasteful number, since it uses less digits than its factorization.

11915719717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57013043.

The product of its digits is 138915, while the sum is 49.

The spelling of 11915719717 in words is "eleven billion, nine hundred fifteen million, seven hundred nineteen thousand, seven hundred seventeen".