1825199781888 has 192 divisors, whose sum is σ = 5802948103680. Its totient is φ = 498812092416.

The previous prime is 1825199781887. The next prime is 1825199781893. The reversal of 1825199781888 is 8881879915281.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1825199781887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66606 + ... + 1911762.

It is an arithmetic number, because the mean of its divisors is an integer number (30223688040).

Almost surely, 2^{1825199781888} 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 1825199781888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2901474051840).

1825199781888 is an abundant number, since it is smaller than the sum of its proper divisors (3977748321792).

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

1825199781888 is a wasteful number, since it uses less digits than its factorization.

1825199781888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845212 (or 1845192 counting only the distinct ones).

The product of its digits is 185794560, while the sum is 75.

The spelling of 1825199781888 in words is "one trillion, eight hundred twenty-five billion, one hundred ninety-nine million, seven hundred eighty-one thousand, eight hundred eighty-eight".