11663451071 has 2 divisors, whose sum is σ = 11663451072. Its totient is φ = 11663451070.

The previous prime is 11663451047. The next prime is 11663451127. The reversal of 11663451071 is 17015436611.

It is a weak prime.

It is an emirp because it is prime and its reverse (17015436611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11663451071 - 2¹⁰ = 11663450047 is a prime.

It is a super-2 number, since 2×11663451071² (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 (11660451071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5831725535 + 5831725536.

It is an arithmetic number, because the mean of its divisors is an integer number (5831725536).

Almost surely, 2^11663451071 is an apocalyptic number.

11663451071 is a deficient number, since it is larger than the sum of its proper divisors (1).

11663451071 is an equidigital number, since it uses as much as digits as its factorization.

11663451071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

Adding to 11663451071 its reverse (17015436611), we get a palindrome (28678887682).

The spelling of 11663451071 in words is "eleven billion, six hundred sixty-three million, four hundred fifty-one thousand, seventy-one".