1989285796608 has 576 divisors, whose sum is σ = 6229939322880. Its totient is φ = 557564313600.

The previous prime is 1989285796591. The next prime is 1989285796609. The reversal of 1989285796608 is 8066975829891.

It is not an unprimeable number, because it can be changed into a prime (1989285796609) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 782258185 + ... + 782260727.

It is an arithmetic number, because the mean of its divisors is an integer number (10815866880).

Almost surely, 2^{1989285796608} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1989285796608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3114969661440).

1989285796608 is an abundant number, since it is smaller than the sum of its proper divisors (4240653526272).

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

1989285796608 is a wasteful number, since it uses less digits than its factorization.

1989285796608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736 (or 2722 counting only the distinct ones).

The product of its (nonzero) digits is 940584960, while the sum is 78.

The spelling of 1989285796608 in words is "one trillion, nine hundred eighty-nine billion, two hundred eighty-five million, seven hundred ninety-six thousand, six hundred eight".