12147137985 has 8 divisors (see below), whose sum is σ = 19435420800. Its totient is φ = 6478473584.

The previous prime is 12147137963. The next prime is 12147138011. The reversal of 12147137985 is 58973174121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12147137985 - 2⁵ = 12147137953 is a prime.

It is a super-2 number, since 2×12147137985² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404904585 + ... + 404904614.

It is an arithmetic number, because the mean of its divisors is an integer number (2429427600).

Almost surely, 2^12147137985 is an apocalyptic number.

12147137985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12147137985 is a deficient number, since it is larger than the sum of its proper divisors (7288282815).

12147137985 is an equidigital number, since it uses as much as digits as its factorization.

12147137985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809809207.

The product of its digits is 423360, while the sum is 48.

The spelling of 12147137985 in words is "twelve billion, one hundred forty-seven million, one hundred thirty-seven thousand, nine hundred eighty-five".