489771285984 has 72 divisors (see below), whose sum is σ = 1405112737392. Its totient is φ = 161812331520.

The previous prime is 489771285979. The next prime is 489771286009. The reversal of 489771285984 is 489582177984.

489771285984 is a `hidden beast` number, since 4 + 8 + 9 + 7 + 7 + 1 + 28 + 598 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×489771285984² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 7492212 + ... + 7557299.

It is an arithmetic number, because the mean of its divisors is an integer number (19515454686).

Almost surely, 2^489771285984 is an apocalyptic number.

It is an amenable number.

489771285984 is an abundant number, since it is smaller than the sum of its proper divisors (915341451408).

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

489771285984 is a wasteful number, since it uses less digits than its factorization.

489771285984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15049640 (or 15049629 counting only the distinct ones).

The product of its digits is 325140480, while the sum is 72.

The spelling of 489771285984 in words is "four hundred eighty-nine billion, seven hundred seventy-one million, two hundred eighty-five thousand, nine hundred eighty-four".