1985799535200 has 216 divisors, whose sum is σ = 7541074090368. Its totient is φ = 488812170240.

The previous prime is 1985799535199. The next prime is 1985799535217. The reversal of 1985799535200 is 25359975891.

1985799535200 is a `hidden beast` number, since 1 + 9 + 8 + 5 + 7 + 99 + 535 + 2 + 0 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 10514304 + ... + 10701503.

It is an arithmetic number, because the mean of its divisors is an integer number (34912380048).

Almost surely, 2^{1985799535200} is an apocalyptic number.

1985799535200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1985799535200 is an abundant number, since it is smaller than the sum of its proper divisors (5555274555168).

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

1985799535200 is a wasteful number, since it uses less digits than its factorization.

1985799535200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21215846 (or 21215830 counting only the distinct ones).

The product of its (nonzero) digits is 30618000, while the sum is 63.

The spelling of 1985799535200 in words is "one trillion, nine hundred eighty-five billion, seven hundred ninety-nine million, five hundred thirty-five thousand, two hundred".