16185128149 has 2 divisors, whose sum is σ = 16185128150. Its totient is φ = 16185128148.

The previous prime is 16185128101. The next prime is 16185128153. The reversal of 16185128149 is 94182158161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11738639025 + 4446489124 = 108345^2 + 66682^2 .

It is a cyclic number.

It is not a de Polignac number, because 16185128149 - 2⁷ = 16185128021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16185128099 and 16185128108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16185128249) 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, 8092564074 + 8092564075.

It is an arithmetic number, because the mean of its divisors is an integer number (8092564075).

Almost surely, 2^16185128149 is an apocalyptic number.

It is an amenable number.

16185128149 is a deficient number, since it is larger than the sum of its proper divisors (1).

16185128149 is an equidigital number, since it uses as much as digits as its factorization.

16185128149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 46.

The spelling of 16185128149 in words is "sixteen billion, one hundred eighty-five million, one hundred twenty-eight thousand, one hundred forty-nine".