11391039533 has 8 divisors (see below), whose sum is σ = 12258824760. Its totient is φ = 10545223680.

The previous prime is 11391039511. The next prime is 11391039617. The reversal of 11391039533 is 33593019311.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10843849 + 11380195684 = 3293^2 + 106678^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11391039533 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 (11391036533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5491268 + ... + 5493341.

It is an arithmetic number, because the mean of its divisors is an integer number (1532353095).

Almost surely, 2^11391039533 is an apocalyptic number.

It is an amenable number.

11391039533 is a deficient number, since it is larger than the sum of its proper divisors (867785227).

11391039533 is a wasteful number, since it uses less digits than its factorization.

11391039533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10984687.

The product of its (nonzero) digits is 32805, while the sum is 38.

The spelling of 11391039533 in words is "eleven billion, three hundred ninety-one million, thirty-nine thousand, five hundred thirty-three".