16868920689 has 12 divisors (see below), whose sum is σ = 25648651600. Its totient is φ = 10654055064.

The previous prime is 16868920657. The next prime is 16868920753. The reversal of 16868920689 is 98602986861.

It is not a de Polignac number, because 16868920689 - 2⁵ = 16868920657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16868920609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49324159 + ... + 49324500.

Almost surely, 2^16868920689 is an apocalyptic number.

16868920689 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16868920689 is a deficient number, since it is larger than the sum of its proper divisors (8779730911).

16868920689 is a wasteful number, since it uses less digits than its factorization.

16868920689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98648684 (or 98648681 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 63.

The spelling of 16868920689 in words is "sixteen billion, eight hundred sixty-eight million, nine hundred twenty thousand, six hundred eighty-nine".