16717071681 has 20 divisors (see below), whose sum is σ = 25084426752. Its totient is φ = 11094726168.

The previous prime is 16717071659. The next prime is 16717071727. The reversal of 16717071681 is 18617071761.

It is not a de Polignac number, because 16717071681 - 2⁵ = 16717071649 is a prime.

It is a super-2 number, since 2×16717071681² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (16717071181) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 444681 + ... + 480806.

Almost surely, 2^16717071681 is an apocalyptic number.

It is an amenable number.

16717071681 is a deficient number, since it is larger than the sum of its proper divisors (8367355071).

16717071681 is an equidigital number, since it uses as much as digits as its factorization.

16717071681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925722 (or 925713 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 45.

The spelling of 16717071681 in words is "sixteen billion, seven hundred seventeen million, seventy-one thousand, six hundred eighty-one".