689183381985 has 32 divisors (see below), whose sum is σ = 1260274498560. Its totient is φ = 315041896128.

The previous prime is 689183381959. The next prime is 689183381993. The reversal of 689183381985 is 589183381986.

689183381985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 689183381985 - 2⁶ = 689183381921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2604106 + ... + 2856524.

It is an arithmetic number, because the mean of its divisors is an integer number (39383578080).

Almost surely, 2^689183381985 is an apocalyptic number.

It is an amenable number.

689183381985 is a deficient number, since it is larger than the sum of its proper divisors (571091116575).

689183381985 is a wasteful number, since it uses less digits than its factorization.

689183381985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278437.

The product of its digits is 89579520, while the sum is 69.

Subtracting from 689183381985 its reverse (589183381986), we obtain a palindrome (99999999999).

The spelling of 689183381985 in words is "six hundred eighty-nine billion, one hundred eighty-three million, three hundred eighty-one thousand, nine hundred eighty-five".