11891911583 has 2 divisors, whose sum is σ = 11891911584. Its totient is φ = 11891911582.

The previous prime is 11891911571. The next prime is 11891911601. The reversal of 11891911583 is 38511919811.

It is a happy number.

11891911583 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (38511919811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11891911583 - 2¹² = 11891907487 is a prime.

It is a super-2 number, since 2×11891911583² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11891911523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5945955791 + 5945955792.

It is an arithmetic number, because the mean of its divisors is an integer number (5945955792).

Almost surely, 2^11891911583 is an apocalyptic number.

11891911583 is a deficient number, since it is larger than the sum of its proper divisors (1).

11891911583 is an equidigital number, since it uses as much as digits as its factorization.

11891911583 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 47.

The spelling of 11891911583 in words is "eleven billion, eight hundred ninety-one million, nine hundred eleven thousand, five hundred eighty-three".