1681200731328 has 112 divisors (see below), whose sum is σ = 4463629457280. Its totient is φ = 558455040000.

The previous prime is 1681200731317. The next prime is 1681200731381. The reversal of 1681200731328 is 8231370021861.

It is a self number, because there is not a number n which added to its sum of digits gives 1681200731328.

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, 186774828 + ... + 186783828.

It is an arithmetic number, because the mean of its divisors is an integer number (39853834440).

Almost surely, 2^{1681200731328} 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 1681200731328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2231814728640).

1681200731328 is an abundant number, since it is smaller than the sum of its proper divisors (2782428725952).

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

1681200731328 is a wasteful number, since it uses less digits than its factorization.

1681200731328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12286 (or 12276 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The spelling of 1681200731328 in words is "one trillion, six hundred eighty-one billion, two hundred million, seven hundred thirty-one thousand, three hundred twenty-eight".