11638980671 has 2 divisors, whose sum is σ = 11638980672. Its totient is φ = 11638980670.

The previous prime is 11638980649. The next prime is 11638980673. The reversal of 11638980671 is 17608983611.

It is a strong prime.

It is an emirp because it is prime and its reverse (17608983611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11638980671 - 2¹⁴ = 11638964287 is a prime.

It is a super-2 number, since 2×11638980671² (a number of 21 digits) contains 22 as substring.

Together with 11638980673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11638980673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5819490335 + 5819490336.

It is an arithmetic number, because the mean of its divisors is an integer number (5819490336).

Almost surely, 2^11638980671 is an apocalyptic number.

11638980671 is a deficient number, since it is larger than the sum of its proper divisors (1).

11638980671 is an equidigital number, since it uses as much as digits as its factorization.

11638980671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 11638980671 in words is "eleven billion, six hundred thirty-eight million, nine hundred eighty thousand, six hundred seventy-one".