1489945387500 has 432 divisors, whose sum is σ = 4896624096000. Its totient is φ = 396119160000.

The previous prime is 1489945387499. The next prime is 1489945387531. The reversal of 1489945387500 is 57835499841.

1489945387500 is a `hidden beast` number, since 1 + 4 + 8 + 9 + 9 + 45 + 3 + 87 + 500 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1515712009 + ... + 1515712991.

It is an arithmetic number, because the mean of its divisors is an integer number (11334778000).

Almost surely, 2^{1489945387500} is an apocalyptic number.

1489945387500 is a gapful number since it is divisible by the number (10) 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 1489945387500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2448312048000).

1489945387500 is an abundant number, since it is smaller than the sum of its proper divisors (3406678708500).

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

1489945387500 is an frugal number, since it uses more digits than its factorization.

1489945387500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526 (or 1492 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 63.

The spelling of 1489945387500 in words is "one trillion, four hundred eighty-nine billion, nine hundred forty-five million, three hundred eighty-seven thousand, five hundred".