489531265920 has 768 divisors, whose sum is σ = 1797976440000. Its totient is φ = 122541834240.

The previous prime is 489531265877. The next prime is 489531265931. The reversal of 489531265920 is 29562135984.

489531265920 is a `hidden beast` number, since 4 + 89 + 531 + 2 + 6 + 5 + 9 + 20 = 666.

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 1090269856 + ... + 1090270304.

Almost surely, 2^489531265920 is an apocalyptic number.

489531265920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 489531265920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (898988220000).

489531265920 is an abundant number, since it is smaller than the sum of its proper divisors (1308445174080).

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

489531265920 is a wasteful number, since it uses less digits than its factorization.

489531265920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 489531265920 in words is "four hundred eighty-nine billion, five hundred thirty-one million, two hundred sixty-five thousand, nine hundred twenty".