689909481027 has 16 divisors (see below), whose sum is σ = 1100710283680. Its totient is φ = 424559680416.

The previous prime is 689909480959. The next prime is 689909481059. The reversal of 689909481027 is 720184909986.

689909481027 is a `hidden beast` number, since 68 + 9 + 90 + 9 + 481 + 0 + 2 + 7 = 666.

It is not a de Polignac number, because 689909481027 - 2³⁰ = 688835739203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689909481727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 982776688 + ... + 982777389.

It is an arithmetic number, because the mean of its divisors is an integer number (68794392730).

Almost surely, 2^689909481027 is an apocalyptic number.

689909481027 is a deficient number, since it is larger than the sum of its proper divisors (410800802653).

689909481027 is a wasteful number, since it uses less digits than its factorization.

689909481027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965554099 (or 1965554093 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 63.

The spelling of 689909481027 in words is "six hundred eighty-nine billion, nine hundred nine million, four hundred eighty-one thousand, twenty-seven".