12171463986 has 32 divisors (see below), whose sum is σ = 27173507328. Its totient is φ = 3602546640.

The previous prime is 12171463981. The next prime is 12171463987. The reversal of 12171463986 is 68936417121.

It is not an unprimeable number, because it can be changed into a prime (12171463981) 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 in 15 ways as a sum of consecutive naturals, for example, 2141536 + ... + 2147211.

It is an arithmetic number, because the mean of its divisors is an integer number (849172104).

Almost surely, 2^12171463986 is an apocalyptic number.

12171463986 is an abundant number, since it is smaller than the sum of its proper divisors (15002043342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12171463986 is a wasteful number, since it uses less digits than its factorization.

12171463986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4288806.

The product of its digits is 435456, while the sum is 48.

The spelling of 12171463986 in words is "twelve billion, one hundred seventy-one million, four hundred sixty-three thousand, nine hundred eighty-six".