689045488468 has 6 divisors (see below), whose sum is σ = 1205829604826. Its totient is φ = 344522744232.

The previous prime is 689045488447. The next prime is 689045488493. The reversal of 689045488468 is 864884540986.

It can be written as a sum of positive squares in only one way, i.e., 432414086724 + 256631401744 = 657582^2 + 506588^2 .

It is a junction number, because it is equal to n+sod(n) for n = 689045488397 and 689045488406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86130686055 + ... + 86130686062.

Almost surely, 2^689045488468 is an apocalyptic number.

It is an amenable number.

689045488468 is a deficient number, since it is larger than the sum of its proper divisors (516784116358).

689045488468 is a wasteful number, since it uses less digits than its factorization.

689045488468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172261372121 (or 172261372119 counting only the distinct ones).

The product of its (nonzero) digits is 424673280, while the sum is 70.

The spelling of 689045488468 in words is "six hundred eighty-nine billion, forty-five million, four hundred eighty-eight thousand, four hundred sixty-eight".