16399711081 has 16 divisors (see below), whose sum is σ = 18077472000. Its totient is φ = 14782860288.

The previous prime is 16399711067. The next prime is 16399711151. The reversal of 16399711081 is 18011799361.

It is a cyclic number.

It is not a de Polignac number, because 16399711081 - 2⁵ = 16399711049 is a prime.

It is a super-3 number, since 3×16399711081³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16399711001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244450 + ... + 304228.

It is an arithmetic number, because the mean of its divisors is an integer number (1129842000).

Almost surely, 2^16399711081 is an apocalyptic number.

It is an amenable number.

16399711081 is a deficient number, since it is larger than the sum of its proper divisors (1677760919).

16399711081 is a wasteful number, since it uses less digits than its factorization.

16399711081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60288.

The product of its (nonzero) digits is 81648, while the sum is 46.

The spelling of 16399711081 in words is "sixteen billion, three hundred ninety-nine million, seven hundred eleven thousand, eighty-one".