16165181899 has 2 divisors, whose sum is σ = 16165181900. Its totient is φ = 16165181898.

The previous prime is 16165181887. The next prime is 16165181939. The reversal of 16165181899 is 99818156161.

It is a happy number.

16165181899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16165181899 - 2⁷ = 16165181771 is a prime.

It is a super-2 number, since 2×16165181899² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16165181819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8082590949 + 8082590950.

It is an arithmetic number, because the mean of its divisors is an integer number (8082590950).

Almost surely, 2^16165181899 is an apocalyptic number.

16165181899 is a deficient number, since it is larger than the sum of its proper divisors (1).

16165181899 is an equidigital number, since it uses as much as digits as its factorization.

16165181899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 55.

The spelling of 16165181899 in words is "sixteen billion, one hundred sixty-five million, one hundred eighty-one thousand, eight hundred ninety-nine".