11591043311 has 4 divisors (see below), whose sum is σ = 11640790512. Its totient is φ = 11541296112.

The previous prime is 11591043281. The next prime is 11591043329. The reversal of 11591043311 is 11334019511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11591043311 - 2¹⁴ = 11591026927 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 (11591043341) 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, 24873251 + ... + 24873716.

It is an arithmetic number, because the mean of its divisors is an integer number (2910197628).

Almost surely, 2^11591043311 is an apocalyptic number.

11591043311 is a deficient number, since it is larger than the sum of its proper divisors (49747201).

11591043311 is an equidigital number, since it uses as much as digits as its factorization.

11591043311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49747200.

The product of its (nonzero) digits is 1620, while the sum is 29.

The spelling of 11591043311 in words is "eleven billion, five hundred ninety-one million, forty-three thousand, three hundred eleven".