689101101985 has 16 divisors (see below), whose sum is σ = 856758124800. Its totient is φ = 531448447936.

The previous prime is 689101101973. The next prime is 689101102061. The reversal of 689101101985 is 589101101986.

It is a cyclic number.

It is not a de Polignac number, because 689101101985 - 2¹¹ = 689101099937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3578845 + ... + 3766474.

It is an arithmetic number, because the mean of its divisors is an integer number (53547382800).

Almost surely, 2^689101101985 is an apocalyptic number.

It is an amenable number.

689101101985 is a deficient number, since it is larger than the sum of its proper divisors (167657022815).

689101101985 is a wasteful number, since it uses less digits than its factorization.

689101101985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7346000.

The product of its (nonzero) digits is 155520, while the sum is 49.

Subtracting from 689101101985 its reverse (589101101986), we obtain a palindrome (99999999999).

The spelling of 689101101985 in words is "six hundred eighty-nine billion, one hundred one million, one hundred one thousand, nine hundred eighty-five".