1943381911968 has 144 divisors (see below), whose sum is σ = 6331903119360. Its totient is φ = 553853127168.

The previous prime is 1943381911931. The next prime is 1943381911981. The reversal of 1943381911968 is 8691191833491.

1943381911968 is a `hidden beast` number, since 1 + 9 + 433 + 8 + 1 + 9 + 1 + 196 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

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 23 ways as a sum of consecutive naturals, for example, 413728 + ... + 2014431.

It is an arithmetic number, because the mean of its divisors is an integer number (43971549440).

Almost surely, 2^{1943381911968} is an apocalyptic number.

1943381911968 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 1943381911968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3165951559680).

1943381911968 is an abundant number, since it is smaller than the sum of its proper divisors (4388521207392).

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

1943381911968 is a wasteful number, since it uses less digits than its factorization.

1943381911968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428579 (or 2428568 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The spelling of 1943381911968 in words is "one trillion, nine hundred forty-three billion, three hundred eighty-one million, nine hundred eleven thousand, nine hundred sixty-eight".