489709907985 has 32 divisors (see below), whose sum is σ = 788388606720. Its totient is φ = 259565891328.

The previous prime is 489709907971. The next prime is 489709908031. The reversal of 489709907985 is 589709907984.

It is not a de Polignac number, because 489709907985 - 2⁹ = 489709907473 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, 1464804 + ... + 1767786.

It is an arithmetic number, because the mean of its divisors is an integer number (24637143960).

Almost surely, 2^489709907985 is an apocalyptic number.

It is an amenable number.

489709907985 is a deficient number, since it is larger than the sum of its proper divisors (298678698735).

489709907985 is a wasteful number, since it uses less digits than its factorization.

489709907985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303657.

The product of its (nonzero) digits is 411505920, while the sum is 75.

Subtracting 489709907985 from its reverse (589709907984), we obtain a palindrome (99999999999).

The spelling of 489709907985 in words is "four hundred eighty-nine billion, seven hundred nine million, nine hundred seven thousand, nine hundred eighty-five".