11638479532171 has 2 divisors, whose sum is σ = 11638479532172. Its totient is φ = 11638479532170.

The previous prime is 11638479532157. The next prime is 11638479532177. The reversal of 11638479532171 is 17123597483611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11638479532171 - 2³⁵ = 11604119793803 is a prime.

It is not a weakly prime, because it can be changed into another prime (11638479532177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5819239766085 + 5819239766086.

It is an arithmetic number, because the mean of its divisors is an integer number (5819239766086).

Almost surely, 2^{11638479532171} is an apocalyptic number.

11638479532171 is a deficient number, since it is larger than the sum of its proper divisors (1).

11638479532171 is an equidigital number, since it uses as much as digits as its factorization.

11638479532171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 58.

The spelling of 11638479532171 in words is "eleven trillion, six hundred thirty-eight billion, four hundred seventy-nine million, five hundred thirty-two thousand, one hundred seventy-one".