16128809215 has 16 divisors (see below), whose sum is σ = 20399752800. Its totient is φ = 12223050112.

The previous prime is 16128809209. The next prime is 16128809227. The reversal of 16128809215 is 51290882161.

It is a cyclic number.

It is not a de Polignac number, because 16128809215 - 2²³ = 16120420607 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 1041685 + ... + 1057054.

It is an arithmetic number, because the mean of its divisors is an integer number (1274984550).

Almost surely, 2^16128809215 is an apocalyptic number.

16128809215 is a deficient number, since it is larger than the sum of its proper divisors (4270943585).

16128809215 is a wasteful number, since it uses less digits than its factorization.

16128809215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098826.

The product of its (nonzero) digits is 69120, while the sum is 43.

The spelling of 16128809215 in words is "sixteen billion, one hundred twenty-eight million, eight hundred nine thousand, two hundred fifteen".