16618128559 has 2 divisors, whose sum is σ = 16618128560. Its totient is φ = 16618128558.

The previous prime is 16618128529. The next prime is 16618128599. The reversal of 16618128559 is 95582181661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16618128559 - 2⁷ = 16618128431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16618128509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8309064279 + 8309064280.

It is an arithmetic number, because the mean of its divisors is an integer number (8309064280).

Almost surely, 2^16618128559 is an apocalyptic number.

16618128559 is a deficient number, since it is larger than the sum of its proper divisors (1).

16618128559 is an equidigital number, since it uses as much as digits as its factorization.

16618128559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 52.

The spelling of 16618128559 in words is "sixteen billion, six hundred eighteen million, one hundred twenty-eight thousand, five hundred fifty-nine".