11291179391 has 4 divisors (see below), whose sum is σ = 11955366432. Its totient is φ = 10626992352.

The previous prime is 11291179363. The next prime is 11291179397. The reversal of 11291179391 is 19397119211.

It is a happy number.

11291179391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19397119211 = 3307 ⋅5865473.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11291179391 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 (11291179397) 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 3 ways as a sum of consecutive naturals, for example, 332093495 + ... + 332093528.

It is an arithmetic number, because the mean of its divisors is an integer number (2988841608).

Almost surely, 2^11291179391 is an apocalyptic number.

11291179391 is a deficient number, since it is larger than the sum of its proper divisors (664187041).

11291179391 is an equidigital number, since it uses as much as digits as its factorization.

11291179391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664187040.

The product of its digits is 30618, while the sum is 44.

The spelling of 11291179391 in words is "eleven billion, two hundred ninety-one million, one hundred seventy-nine thousand, three hundred ninety-one".