1983520599840 has 960 divisors, whose sum is σ = 7897783170816. Its totient is φ = 465162559488.

The previous prime is 1983520599829. The next prime is 1983520599869. The reversal of 1983520599840 is 489950253891.

1983520599840 is a `hidden beast` number, since 1 + 9 + 8 + 35 + 2 + 0 + 599 + 8 + 4 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1135385847 + ... + 1135387593.

Almost surely, 2^{1983520599840} is an apocalyptic number.

1983520599840 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 1983520599840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3948891585408).

1983520599840 is an abundant number, since it is smaller than the sum of its proper divisors (5914262570976).

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

1983520599840 is a wasteful number, since it uses less digits than its factorization.

1983520599840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103 (or 2086 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 63.

The spelling of 1983520599840 in words is "one trillion, nine hundred eighty-three billion, five hundred twenty million, five hundred ninety-nine thousand, eight hundred forty".