689542868245986 has 24 divisors (see below), whose sum is σ = 1534388184296604. Its totient is φ = 223635524836320.

The previous prime is 689542868245967. The next prime is 689542868245993.

689542868245986 is a `hidden beast` number, since 6 + 8 + 9 + 5 + 4 + 2 + 8 + 6 + 8 + 2 + 4 + 598 + 6 = 666.

689542868245986 is nontrivially palindromic in base 10.

689542868245986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 555358005621225 + 134184862624761 = 23566035^2 + 11583819^2 .

It is a super-2 number, since 2×689542868245986² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 689542868245896 and 689542868245905.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 517674825345 + ... + 517674826676.

Almost surely, 2^{689542868245986} is an apocalyptic number.

689542868245986 is an abundant number, since it is smaller than the sum of its proper divisors (844845316050618).

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

689542868245986 is a wasteful number, since it uses less digits than its factorization.

689542868245986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035349652066 (or 1035349652063 counting only the distinct ones).

The product of its digits is 114661785600, while the sum is 90.

The spelling of 689542868245986 in words is "six hundred eighty-nine trillion, five hundred forty-two billion, eight hundred sixty-eight million, two hundred forty-five thousand, nine hundred eighty-six".