16618128511 has 2 divisors, whose sum is σ = 16618128512. Its totient is φ = 16618128510.

The previous prime is 16618128509. The next prime is 16618128529. The reversal of 16618128511 is 11582181661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16618128511 - 2¹ = 16618128509 is a prime.

It is a super-2 number, since 2×16618128511² (a number of 21 digits) contains 22 as substring.

Together with 16618128509, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16618129511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8309064255 + 8309064256.

It is an arithmetic number, because the mean of its divisors is an integer number (8309064256).

Almost surely, 2^16618128511 is an apocalyptic number.

16618128511 is a deficient number, since it is larger than the sum of its proper divisors (1).

16618128511 is an equidigital number, since it uses as much as digits as its factorization.

16618128511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 40.

The spelling of 16618128511 in words is "sixteen billion, six hundred eighteen million, one hundred twenty-eight thousand, five hundred eleven".