18187680553127 has 4 divisors (see below), whose sum is σ = 18610649868360. Its totient is φ = 17764711237896.

The previous prime is 18187680553087. The next prime is 18187680553139. The reversal of 18187680553127 is 72135508678181.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18187680553127 - 2⁴⁰ = 17088168925351 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18187680553127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18187680553177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211484657552 + ... + 211484657637.

It is an arithmetic number, because the mean of its divisors is an integer number (4652662467090).

Almost surely, 2^{18187680553127} is an apocalyptic number.

18187680553127 is a deficient number, since it is larger than the sum of its proper divisors (422969315233).

18187680553127 is an equidigital number, since it uses as much as digits as its factorization.

18187680553127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422969315232.

The product of its (nonzero) digits is 22579200, while the sum is 62.

The spelling of 18187680553127 in words is "eighteen trillion, one hundred eighty-seven billion, six hundred eighty million, five hundred fifty-three thousand, one hundred twenty-seven".