2081338197888 has 128 divisors (see below), whose sum is σ = 5557232707200. Its totient is φ = 690188728320.

The previous prime is 2081338197833. The next prime is 2081338197893. The reversal of 2081338197888 is 8887918331802.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67252498 + ... + 67283438.

It is an arithmetic number, because the mean of its divisors is an integer number (43415880525).

Almost surely, 2^{2081338197888} 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 2081338197888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2778616353600).

2081338197888 is an abundant number, since it is smaller than the sum of its proper divisors (3475894509312).

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

2081338197888 is a wasteful number, since it uses less digits than its factorization.

2081338197888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31860 (or 31848 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 66.

The spelling of 2081338197888 in words is "two trillion, eighty-one billion, three hundred thirty-eight million, one hundred ninety-seven thousand, eight hundred eighty-eight".