1681133539200 has 768 divisors, whose sum is σ = 5849963078400. Its totient is φ = 423859322880.

The previous prime is 1681133539181. The next prime is 1681133539201. The reversal of 1681133539200 is 29353311861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681133539201) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2032809187 + ... + 2032810013.

It is an arithmetic number, because the mean of its divisors is an integer number (7617139425).

Almost surely, 2^{1681133539200} is an apocalyptic number.

1681133539200 is a gapful number since it is divisible by the number (10) 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 1681133539200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2924981539200).

1681133539200 is an abundant number, since it is smaller than the sum of its proper divisors (4168829539200).

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

1681133539200 is a wasteful number, since it uses less digits than its factorization.

1681133539200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047 (or 1030 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The spelling of 1681133539200 in words is "one trillion, six hundred eighty-one billion, one hundred thirty-three million, five hundred thirty-nine thousand, two hundred".