1943990783904 has 384 divisors, whose sum is σ = 5871237765120. Its totient is φ = 558254592000.

The previous prime is 1943990783881. The next prime is 1943990783921. The reversal of 1943990783904 is 4093870993491.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 505324509 + ... + 505328355.

It is an arithmetic number, because the mean of its divisors is an integer number (15289681680).

Almost surely, 2^{1943990783904} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1943990783904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2935618882560).

1943990783904 is an abundant number, since it is smaller than the sum of its proper divisors (3927246981216).

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

1943990783904 is a wasteful number, since it uses less digits than its factorization.

1943990783904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4204 (or 4196 counting only the distinct ones).

The product of its (nonzero) digits is 52907904, while the sum is 66.

The spelling of 1943990783904 in words is "one trillion, nine hundred forty-three billion, nine hundred ninety million, seven hundred eighty-three thousand, nine hundred four".