489784644864 has 72 divisors (see below), whose sum is σ = 1448379381120. Its totient is φ = 163261545984.

The previous prime is 489784644841. The next prime is 489784644913. The reversal of 489784644864 is 468446487984.

489784644864 is a `hidden beast` number, since 4 + 8 + 9 + 7 + 84 + 64 + 486 + 4 = 666.

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

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

It is a junction number, because it is equal to n+sod(n) for n = 489784644792 and 489784644801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35423112 + ... + 35436935.

Almost surely, 2^489784644864 is an apocalyptic number.

It is an amenable number.

489784644864 is an abundant number, since it is smaller than the sum of its proper divisors (958594736256).

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

489784644864 is an equidigital number, since it uses as much as digits as its factorization.

489784644864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70860072 (or 70860052 counting only the distinct ones).

The product of its digits is 1189085184, while the sum is 72.

The spelling of 489784644864 in words is "four hundred eighty-nine billion, seven hundred eighty-four million, six hundred forty-four thousand, eight hundred sixty-four".