689608806986 has 16 divisors (see below), whose sum is σ = 1167362871840. Its totient is φ = 302649632880.

The previous prime is 689608806907. The next prime is 689608806989.

689608806986 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (689608806989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540445136 + ... + 540446411.

It is an arithmetic number, because the mean of its divisors is an integer number (72960179490).

Almost surely, 2^689608806986 is an apocalyptic number.

689608806986 is a deficient number, since it is larger than the sum of its proper divisors (477754064854).

689608806986 is a wasteful number, since it uses less digits than its factorization.

689608806986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080891589.

The product of its (nonzero) digits is 429981696, while the sum is 74.

The spelling of 689608806986 in words is "six hundred eighty-nine billion, six hundred eight million, eight hundred six thousand, nine hundred eighty-six".