689090104881 has 24 divisors (see below), whose sum is σ = 1005260369256. Its totient is φ = 454842524160.

The previous prime is 689090104847. The next prime is 689090104939. The reversal of 689090104881 is 188401090986.

689090104881 is a `hidden beast` number, since 68 + 9 + 0 + 90 + 10 + 488 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 416230135281 + 272859969600 = 645159^2 + 522360^2 .

It is not a de Polignac number, because 689090104881 - 2⁶ = 689090104817 is a prime.

It is a super-3 number, since 3×689090104881³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (689090102881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 542970 + ... + 1293443.

It is an arithmetic number, because the mean of its divisors is an integer number (41885848719).

Almost surely, 2^689090104881 is an apocalyptic number.

It is an amenable number.

689090104881 is a deficient number, since it is larger than the sum of its proper divisors (316170264375).

689090104881 is a wasteful number, since it uses less digits than its factorization.

689090104881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836833 (or 1836830 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The spelling of 689090104881 in words is "six hundred eighty-nine billion, ninety million, one hundred four thousand, eight hundred eighty-one".