1916081443668 has 768 divisors, whose sum is σ = 5971746816000. Its totient is φ = 475517952000.

The previous prime is 1916081443667. The next prime is 1916081443673. The reversal of 1916081443668 is 8663441806191.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916081443667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 3677699248 + ... + 3677699768.

It is an arithmetic number, because the mean of its divisors is an integer number (7775712000).

Almost surely, 2^{1916081443668} 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 1916081443668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2985873408000).

1916081443668 is an abundant number, since it is smaller than the sum of its proper divisors (4055665372332).

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

1916081443668 is a wasteful number, since it uses less digits than its factorization.

1916081443668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677 (or 661 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 57.

The spelling of 1916081443668 in words is "one trillion, nine hundred sixteen billion, eighty-one million, four hundred forty-three thousand, six hundred sixty-eight".