11391171799 has 8 divisors (see below), whose sum is σ = 13036395008. Its totient is φ = 9750426840.

The previous prime is 11391171787. The next prime is 11391171809. The reversal of 11391171799 is 99717119311.

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

It is not a de Polignac number, because 11391171799 - 2²⁵ = 11357617367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11391111799) 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 7 ways as a sum of consecutive naturals, for example, 1114107 + ... + 1124284.

It is an arithmetic number, because the mean of its divisors is an integer number (1629549376).

Almost surely, 2^11391171799 is an apocalyptic number.

11391171799 is a deficient number, since it is larger than the sum of its proper divisors (1645223209).

11391171799 is an equidigital number, since it uses as much as digits as its factorization.

11391171799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239125.

The product of its digits is 107163, while the sum is 49.

The spelling of 11391171799 in words is "eleven billion, three hundred ninety-one million, one hundred seventy-one thousand, seven hundred ninety-nine".