11556332317 has 4 divisors (see below), whose sum is σ = 11802211776. Its totient is φ = 11310452860.

The previous prime is 11556332311. The next prime is 11556332321. The reversal of 11556332317 is 71323365511.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71323365511 = 257 ⋅277522823.

It is a cyclic number.

It is not a de Polignac number, because 11556332317 - 2⁷ = 11556332189 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 (11556332311) 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, 122939659 + ... + 122939752.

It is an arithmetic number, because the mean of its divisors is an integer number (2950552944).

Almost surely, 2^11556332317 is an apocalyptic number.

It is an amenable number.

11556332317 is a deficient number, since it is larger than the sum of its proper divisors (245879459).

11556332317 is an equidigital number, since it uses as much as digits as its factorization.

11556332317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245879458.

The product of its digits is 56700, while the sum is 37.

Adding to 11556332317 its reverse (71323365511), we get a palindrome (82879697828).

The spelling of 11556332317 in words is "eleven billion, five hundred fifty-six million, three hundred thirty-two thousand, three hundred seventeen".