12187214357618 has 4 divisors (see below), whose sum is σ = 18280821536430. Its totient is φ = 6093607178808.

The previous prime is 12187214357611. The next prime is 12187214357677. The reversal of 12187214357618 is 81675341278121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10522218977209 + 1664995380409 = 3243797^2 + 1290347^2 .

It is not an unprimeable number, because it can be changed into a prime (12187214357611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3046803589403 + ... + 3046803589406.

Almost surely, 2^{12187214357618} is an apocalyptic number.

12187214357618 is a deficient number, since it is larger than the sum of its proper divisors (6093607178812).

12187214357618 is an equidigital number, since it uses as much as digits as its factorization.

12187214357618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6093607178811.

The product of its digits is 4515840, while the sum is 56.

The spelling of 12187214357618 in words is "twelve trillion, one hundred eighty-seven billion, two hundred fourteen million, three hundred fifty-seven thousand, six hundred eighteen".