1980844243200 has 648 divisors, whose sum is σ = 7776379342368. Its totient is φ = 497146429440.

The previous prime is 1980844243193. The next prime is 1980844243207. The reversal of 1980844243200 is 23424480891.

1980844243200 is a `hidden beast` number, since 19 + 8 + 0 + 8 + 4 + 424 + 3 + 200 = 666.

It is an interprime number because it is at equal distance from previous prime (1980844243193) and next prime (1980844243207).

It is a tau number, because it is divible by the number of its divisors (648).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1980844243207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 26400939 + ... + 26475861.

Almost surely, 2^{1980844243200} is an apocalyptic number.

1980844243200 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 1980844243200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3888189671184).

1980844243200 is an abundant number, since it is smaller than the sum of its proper divisors (5795535099168).

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

1980844243200 is an equidigital number, since it uses as much as digits as its factorization.

1980844243200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74981 (or 74950 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 1980844243200 in words is "one trillion, nine hundred eighty billion, eight hundred forty-four million, two hundred forty-three thousand, two hundred".