11311995841 has 2 divisors, whose sum is σ = 11311995842. Its totient is φ = 11311995840.

The previous prime is 11311995839. The next prime is 11311995917. The reversal of 11311995841 is 14859911311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7676388225 + 3635607616 = 87615^2 + 60296^2 .

It is a cyclic number.

It is not a de Polignac number, because 11311995841 - 2¹ = 11311995839 is a prime.

It is a super-2 number, since 2×11311995841² (a number of 21 digits) contains 22 as substring.

Together with 11311995839, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11311996841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5655997920 + 5655997921.

It is an arithmetic number, because the mean of its divisors is an integer number (5655997921).

Almost surely, 2^11311995841 is an apocalyptic number.

It is an amenable number.

11311995841 is a deficient number, since it is larger than the sum of its proper divisors (1).

11311995841 is an equidigital number, since it uses as much as digits as its factorization.

11311995841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 43.

The spelling of 11311995841 in words is "eleven billion, three hundred eleven million, nine hundred ninety-five thousand, eight hundred forty-one".