16218441653 has 2 divisors, whose sum is σ = 16218441654. Its totient is φ = 16218441652.

The previous prime is 16218441611. The next prime is 16218441671. The reversal of 16218441653 is 35614481261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9128464849 + 7089976804 = 95543^2 + 84202^2 .

It is a cyclic number.

It is not a de Polignac number, because 16218441653 - 2¹⁰ = 16218440629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16218441653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16218441853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8109220826 + 8109220827.

It is an arithmetic number, because the mean of its divisors is an integer number (8109220827).

Almost surely, 2^16218441653 is an apocalyptic number.

It is an amenable number.

16218441653 is a deficient number, since it is larger than the sum of its proper divisors (1).

16218441653 is an equidigital number, since it uses as much as digits as its factorization.

16218441653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 41.

The spelling of 16218441653 in words is "sixteen billion, two hundred eighteen million, four hundred forty-one thousand, six hundred fifty-three".