1200331991808 has 432 divisors, whose sum is σ = 3771763815456. Its totient is φ = 365590609920.

The previous prime is 1200331991801. The next prime is 1200331991809. The reversal of 1200331991808 is 8081991330021.

It is not an unprimeable number, because it can be changed into a prime (1200331991801) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1236180763 + ... + 1236181733.

It is an arithmetic number, because the mean of its divisors is an integer number (8730934758).

Almost surely, 2^{1200331991808} is an apocalyptic number.

1200331991808 is a gapful number since it is divisible by the number (18) 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 1200331991808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1885881907728).

1200331991808 is an abundant number, since it is smaller than the sum of its proper divisors (2571431823648).

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

1200331991808 is a wasteful number, since it uses less digits than its factorization.

1200331991808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900 (or 1883 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 1200331991808 in words is "one trillion, two hundred billion, three hundred thirty-one million, nine hundred ninety-one thousand, eight hundred eight".