1996330544640 has 320 divisors, whose sum is σ = 7207395750720. Its totient is φ = 523626577920.

The previous prime is 1996330544633. The next prime is 1996330544651. The reversal of 1996330544640 is 464450336991.

It is a happy number.

1996330544640 is a `hidden beast` number, since 1 + 9 + 9 + 6 + 3 + 30 + 544 + 64 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3979582 + ... + 4453058.

It is an arithmetic number, because the mean of its divisors is an integer number (22523111721).

Almost surely, 2^{1996330544640} is an apocalyptic number.

1996330544640 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 1996330544640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3603697875360).

1996330544640 is an abundant number, since it is smaller than the sum of its proper divisors (5211065206080).

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

1996330544640 is an equidigital number, since it uses as much as digits as its factorization.

1996330544640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473570 (or 473548 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 54.

The spelling of 1996330544640 in words is "one trillion, nine hundred ninety-six billion, three hundred thirty million, five hundred forty-four thousand, six hundred forty".