16911111217 has 16 divisors (see below), whose sum is σ = 22705828992. Its totient is φ = 12163835520.

The previous prime is 16911111209. The next prime is 16911111247. The reversal of 16911111217 is 71211111961.

It is a cyclic number.

It is not a de Polignac number, because 16911111217 - 2³ = 16911111209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16911111247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8446108 + ... + 8448109.

It is an arithmetic number, because the mean of its divisors is an integer number (1419114312).

Almost surely, 2^16911111217 is an apocalyptic number.

It is an amenable number.

16911111217 is a deficient number, since it is larger than the sum of its proper divisors (5794717775).

16911111217 is a wasteful number, since it uses less digits than its factorization.

16911111217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16894248.

The product of its digits is 756, while the sum is 31.

The spelling of 16911111217 in words is "sixteen billion, nine hundred eleven million, one hundred eleven thousand, two hundred seventeen".