11321533761 has 4 divisors (see below), whose sum is σ = 15095378352. Its totient is φ = 7547689172.

The previous prime is 11321533757. The next prime is 11321533813. The reversal of 11321533761 is 16733512311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11321533761 - 2² = 11321533757 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11321533721) 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, 1886922291 + ... + 1886922296.

It is an arithmetic number, because the mean of its divisors is an integer number (3773844588).

Almost surely, 2^11321533761 is an apocalyptic number.

It is an amenable number.

11321533761 is a deficient number, since it is larger than the sum of its proper divisors (3773844591).

11321533761 is an equidigital number, since it uses as much as digits as its factorization.

11321533761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3773844590.

The product of its digits is 11340, while the sum is 33.

The spelling of 11321533761 in words is "eleven billion, three hundred twenty-one million, five hundred thirty-three thousand, seven hundred sixty-one".