16800000891 has 16 divisors (see below), whose sum is σ = 22487189760. Its totient is φ = 11156444000.

The previous prime is 16800000871. The next prime is 16800000913. The reversal of 16800000891 is 19800000861.

It is a cyclic number.

It is not a de Polignac number, because 16800000891 - 2⁹ = 16800000379 is a prime.

16800000891 is a strobogrammatic number because it is the same when read upside-down.

It is not an unprimeable number, because it can be changed into a prime (16800000851) 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, 2854690 + ... + 2860568.

It is an arithmetic number, because the mean of its divisors is an integer number (1405449360).

Almost surely, 2^16800000891 is an apocalyptic number.

16800000891 is a deficient number, since it is larger than the sum of its proper divisors (5687188869).

16800000891 is a wasteful number, since it uses less digits than its factorization.

16800000891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9426.

The product of its (nonzero) digits is 3456, while the sum is 33.

The spelling of 16800000891 in words is "sixteen billion, eight hundred million, eight hundred ninety-one", and thus it is an aban number.