989000000685 has 64 divisors (see below), whose sum is σ = 1851104640000. Its totient is φ = 499612276800.

The previous prime is 989000000683. The next prime is 989000000771. The reversal of 989000000685 is 586000000989.

It is not a de Polignac number, because 989000000685 - 2¹ = 989000000683 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 989000000685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989000000683) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14974866 + ... + 15040764.

It is an arithmetic number, because the mean of its divisors is an integer number (28923510000).

Almost surely, 2^989000000685 is an apocalyptic number.

989000000685 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

989000000685 is a deficient number, since it is larger than the sum of its proper divisors (862104639315).

989000000685 is a wasteful number, since it uses less digits than its factorization.

989000000685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71783 (or 71777 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 989000000685 in words is "nine hundred eighty-nine billion, six hundred eighty-five", and thus it is an aban number.