1989573969600 has 1176 divisors, whose sum is σ = 8561529333600. Its totient is φ = 454668318720.

The previous prime is 1989573969563. The next prime is 1989573969611. The reversal of 1989573969600 is 69693759891.

1989573969600 is a `hidden beast` number, since 1 + 9 + 8 + 9 + 5 + 7 + 3 + 9 + 6 + 9 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (1176).

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

It is an unprimeable number.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 400072714 + ... + 400077686.

Almost surely, 2^{1989573969600} is an apocalyptic number.

1989573969600 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 1989573969600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4280764666800).

1989573969600 is an abundant number, since it is smaller than the sum of its proper divisors (6571955364000).

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

1989573969600 is an frugal number, since it uses more digits than its factorization.

1989573969600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5034 (or 4990 counting only the distinct ones).

The product of its (nonzero) digits is 198404640, while the sum is 72.

The spelling of 1989573969600 in words is "one trillion, nine hundred eighty-nine billion, five hundred seventy-three million, nine hundred sixty-nine thousand, six hundred".