11291332591 has 16 divisors (see below), whose sum is σ = 14364806400. Its totient is φ = 8798438040.

The previous prime is 11291332571. The next prime is 11291332603. The reversal of 11291332591 is 19523319211.

It is not a de Polignac number, because 11291332591 - 2⁷ = 11291332463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11291332591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11291332501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1492561 + ... + 1500106.

It is an arithmetic number, because the mean of its divisors is an integer number (897800400).

Almost surely, 2^11291332591 is an apocalyptic number.

11291332591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11291332591 is a deficient number, since it is larger than the sum of its proper divisors (3073473809).

11291332591 is an equidigital number, since it uses as much as digits as its factorization.

11291332591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2992699 (or 2992685 counting only the distinct ones).

The product of its digits is 14580, while the sum is 37.

The spelling of 11291332591 in words is "eleven billion, two hundred ninety-one million, three hundred thirty-two thousand, five hundred ninety-one".