689859958986 has 192 divisors, whose sum is σ = 1736017920000. Its totient is φ = 195795273600.

The previous prime is 689859958927. The next prime is 689859959027.

689859958986 is a `hidden beast` number, since 6 + 8 + 9 + 8 + 599 + 5 + 8 + 9 + 8 + 6 = 666.

689859958986 is nontrivially palindromic in base 10.

689859958986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 689859958896 and 689859958905.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 119993640 + ... + 119999388.

It is an arithmetic number, because the mean of its divisors is an integer number (9041760000).

Almost surely, 2^689859958986 is an apocalyptic number.

689859958986 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 689859958986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (868008960000).

689859958986 is an abundant number, since it is smaller than the sum of its proper divisors (1046157961014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689859958986 is a wasteful number, since it uses less digits than its factorization.

689859958986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6145 (or 6142 counting only the distinct ones).

The product of its digits is 24186470400, while the sum is 90.

The spelling of 689859958986 in words is "six hundred eighty-nine billion, eight hundred fifty-nine million, nine hundred fifty-eight thousand, nine hundred eighty-six".