2033378781644 has 288 divisors, whose sum is σ = 4565812285440. Its totient is φ = 789142072320.

The previous prime is 2033378781593. The next prime is 2033378781659. The reversal of 2033378781644 is 4461878733302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2033378781644.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4042502297 + ... + 4042502799.

It is an arithmetic number, because the mean of its divisors is an integer number (15853514880).

Almost surely, 2^{2033378781644} 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 2033378781644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2282906142720).

2033378781644 is an abundant number, since it is smaller than the sum of its proper divisors (2532433503796).

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

2033378781644 is a wasteful number, since it uses less digits than its factorization.

2033378781644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 56.

The spelling of 2033378781644 in words is "two trillion, thirty-three billion, three hundred seventy-eight million, seven hundred eighty-one thousand, six hundred forty-four".