11391104591 has 6 divisors (see below), whose sum is σ = 11907903840. Its totient is φ = 10895838668.

The previous prime is 11391104521. The next prime is 11391104611. The reversal of 11391104591 is 19540119311.

It is a de Polignac number, because none of the positive numbers 2^k-11391104591 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 (11391104521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10766111 + ... + 10767168.

It is an arithmetic number, because the mean of its divisors is an integer number (1984650640).

Almost surely, 2^11391104591 is an apocalyptic number.

11391104591 is a deficient number, since it is larger than the sum of its proper divisors (516799249).

11391104591 is an equidigital number, since it uses as much as digits as its factorization.

11391104591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21533325 (or 21533302 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 35.

The spelling of 11391104591 in words is "eleven billion, three hundred ninety-one million, one hundred four thousand, five hundred ninety-one".