16891122905 has 16 divisors (see below), whose sum is σ = 21465523584. Its totient is φ = 12715733760.

The previous prime is 16891122889. The next prime is 16891122943. The reversal of 16891122905 is 50922119861.

It is not a de Polignac number, because 16891122905 - 2⁴ = 16891122889 is a prime.

It is a Duffinian 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, 570620 + ... + 599490.

It is an arithmetic number, because the mean of its divisors is an integer number (1341595224).

Almost surely, 2^16891122905 is an apocalyptic number.

It is an amenable number.

16891122905 is a deficient number, since it is larger than the sum of its proper divisors (4574400679).

16891122905 is a wasteful number, since it uses less digits than its factorization.

16891122905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35776.

The product of its (nonzero) digits is 77760, while the sum is 44.

The spelling of 16891122905 in words is "sixteen billion, eight hundred ninety-one million, one hundred twenty-two thousand, nine hundred five".