12147437185 has 16 divisors (see below), whose sum is σ = 15713001360. Its totient is φ = 8961972480.

The previous prime is 12147437173. The next prime is 12147437201. The reversal of 12147437185 is 58173474121.

It can be written as a sum of positive squares in 8 ways, for example, as 4367491569 + 7779945616 = 66087^2 + 88204^2 .

It is not a de Polignac number, because 12147437185 - 2¹¹ = 12147435137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17926 + ... + 156895.

It is an arithmetic number, because the mean of its divisors is an integer number (982062585).

Almost surely, 2^12147437185 is an apocalyptic number.

It is an amenable number.

12147437185 is a deficient number, since it is larger than the sum of its proper divisors (3565564175).

12147437185 is a wasteful number, since it uses less digits than its factorization.

12147437185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175908.

The product of its digits is 188160, while the sum is 43.

The spelling of 12147437185 in words is "twelve billion, one hundred forty-seven million, four hundred thirty-seven thousand, one hundred eighty-five".