11827986171 has 16 divisors (see below), whose sum is σ = 16282795008. Its totient is φ = 7629357600.

The previous prime is 11827986167. The next prime is 11827986217. The reversal of 11827986171 is 17168972811.

11827986171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11827986171 - 2² = 11827986167 is a prime.

It is a super-2 number, since 2×11827986171² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11827986101) 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 in 15 ways as a sum of consecutive naturals, for example, 567385 + ... + 587861.

It is an arithmetic number, because the mean of its divisors is an integer number (1017674688).

Almost surely, 2^11827986171 is an apocalyptic number.

11827986171 is a deficient number, since it is larger than the sum of its proper divisors (4454808837).

11827986171 is a wasteful number, since it uses less digits than its factorization.

11827986171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26722.

The product of its digits is 338688, while the sum is 51.

The spelling of 11827986171 in words is "eleven billion, eight hundred twenty-seven million, nine hundred eighty-six thousand, one hundred seventy-one".