16187218441 has 9 divisors (see below), whose sum is σ = 16545067149. Its totient is φ = 15836957004.

The previous prime is 16187218427. The next prime is 16187218459. The reversal of 16187218441 is 14481278161.

The square root of 16187218441 is 127229.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 16187218441 - 2⁹ = 16187217929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16187218141) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5978410 + ... + 5981116.

Almost surely, 2^16187218441 is an apocalyptic number.

16187218441 is the 127229-th square number.

16187218441 is the 63615-th centered octagonal number.

It is an amenable number.

16187218441 is a deficient number, since it is larger than the sum of its proper divisors (357848708).

16187218441 is an frugal number, since it uses more digits than its factorization.

16187218441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5508 (or 2754 counting only the distinct ones).

The product of its digits is 86016, while the sum is 43.

The spelling of 16187218441 in words is "sixteen billion, one hundred eighty-seven million, two hundred eighteen thousand, four hundred forty-one".