16995390997 has 16 divisors (see below), whose sum is σ = 19287999360. Its totient is φ = 14845419072.

The previous prime is 16995390941. The next prime is 16995391009. The reversal of 16995390997 is 79909359961.

It is a cyclic number.

It is not a de Polignac number, because 16995390997 - 2²⁷ = 16861173269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16995390197) 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, 180303 + ... + 257875.

It is an arithmetic number, because the mean of its divisors is an integer number (1205499960).

Almost surely, 2^16995390997 is an apocalyptic number.

It is an amenable number.

16995390997 is a deficient number, since it is larger than the sum of its proper divisors (2292608363).

16995390997 is a wasteful number, since it uses less digits than its factorization.

16995390997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78492.

The product of its (nonzero) digits is 37200870, while the sum is 67.

The spelling of 16995390997 in words is "sixteen billion, nine hundred ninety-five million, three hundred ninety thousand, nine hundred ninety-seven".