11638010591 has 2 divisors, whose sum is σ = 11638010592. Its totient is φ = 11638010590.

The previous prime is 11638010543. The next prime is 11638010611. The reversal of 11638010591 is 19501083611.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11638010591 - 2¹⁰ = 11638009567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11638010291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5819005295 + 5819005296.

It is an arithmetic number, because the mean of its divisors is an integer number (5819005296).

Almost surely, 2^11638010591 is an apocalyptic number.

11638010591 is a deficient number, since it is larger than the sum of its proper divisors (1).

11638010591 is an equidigital number, since it uses as much as digits as its factorization.

11638010591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 35.

The spelling of 11638010591 in words is "eleven billion, six hundred thirty-eight million, ten thousand, five hundred ninety-one".