11915338817 has 4 divisors (see below), whose sum is σ = 12058897200. Its totient is φ = 11771780436.

The previous prime is 11915338793. The next prime is 11915338819. The reversal of 11915338817 is 71883351911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11915338817 - 2⁶ = 11915338753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11915338819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71779067 + ... + 71779232.

It is an arithmetic number, because the mean of its divisors is an integer number (3014724300).

Almost surely, 2^11915338817 is an apocalyptic number.

It is an amenable number.

11915338817 is a deficient number, since it is larger than the sum of its proper divisors (143558383).

11915338817 is an equidigital number, since it uses as much as digits as its factorization.

11915338817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143558382.

The product of its digits is 181440, while the sum is 47.

The spelling of 11915338817 in words is "eleven billion, nine hundred fifteen million, three hundred thirty-eight thousand, eight hundred seventeen".