1989773145360 has 2400 divisors, whose sum is σ = 9494262328320. Its totient is φ = 375756226560.

The previous prime is 1989773145359. The next prime is 1989773145383. The reversal of 1989773145360 is 635413779891.

1989773145360 is a `hidden beast` number, since 1 + 9 + 8 + 97 + 7 + 3 + 1 + 4 + 536 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 5636750944 + ... + 5636751296.

Almost surely, 2^{1989773145360} is an apocalyptic number.

1989773145360 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 1989773145360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4747131164160).

1989773145360 is an abundant number, since it is smaller than the sum of its proper divisors (7504489182960).

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

1989773145360 is a wasteful number, since it uses less digits than its factorization.

1989773145360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 63.

The spelling of 1989773145360 in words is "one trillion, nine hundred eighty-nine billion, seven hundred seventy-three million, one hundred forty-five thousand, three hundred sixty".