11605127381 has 2 divisors, whose sum is σ = 11605127382. Its totient is φ = 11605127380.

The previous prime is 11605127327. The next prime is 11605127393. The reversal of 11605127381 is 18372150611.

11605127381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11187292900 + 417834481 = 105770^2 + 20441^2 .

It is a cyclic number.

It is not a de Polignac number, because 11605127381 - 2¹⁴ = 11605110997 is a prime.

It is a super-2 number, since 2×11605127381² (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 (11605123381) 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, 5802563690 + 5802563691.

It is an arithmetic number, because the mean of its divisors is an integer number (5802563691).

Almost surely, 2^11605127381 is an apocalyptic number.

It is an amenable number.

11605127381 is a deficient number, since it is larger than the sum of its proper divisors (1).

11605127381 is an equidigital number, since it uses as much as digits as its factorization.

11605127381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 35.

Adding to 11605127381 its reverse (18372150611), we get a palindrome (29977277992).

The spelling of 11605127381 in words is "eleven billion, six hundred five million, one hundred twenty-seven thousand, three hundred eighty-one".