689111991068 has 48 divisors (see below), whose sum is σ = 1260393571584. Its totient is φ = 329048058240.

The previous prime is 689111991053. The next prime is 689111991089. The reversal of 689111991068 is 860199111986.

It is a junction number, because it is equal to n+sod(n) for n = 689111990998 and 689111991016.

It is a congruent number.

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, 285818783 + ... + 285821193.

It is an arithmetic number, because the mean of its divisors is an integer number (26258199408).

Almost surely, 2^689111991068 is an apocalyptic number.

It is an amenable number.

689111991068 is a deficient number, since it is larger than the sum of its proper divisors (571281580516).

689111991068 is a wasteful number, since it uses less digits than its factorization.

689111991068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6122 (or 6120 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 59.

The spelling of 689111991068 in words is "six hundred eighty-nine billion, one hundred eleven million, nine hundred ninety-one thousand, sixty-eight".