16905116991 has 16 divisors (see below), whose sum is σ = 25838014208. Its totient is φ = 9630878400.

The previous prime is 16905116957. The next prime is 16905117041. The reversal of 16905116991 is 19961150961.

It is not a de Polignac number, because 16905116991 - 2¹⁰ = 16905115967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16905116991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16905116911) 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, 1209070 + ... + 1222971.

It is an arithmetic number, because the mean of its divisors is an integer number (1614875888).

Almost surely, 2^16905116991 is an apocalyptic number.

16905116991 is a deficient number, since it is larger than the sum of its proper divisors (8932897217).

16905116991 is a wasteful number, since it uses less digits than its factorization.

16905116991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2432382.

The product of its (nonzero) digits is 131220, while the sum is 48.

The spelling of 16905116991 in words is "sixteen billion, nine hundred five million, one hundred sixteen thousand, nine hundred ninety-one".