16831981731840 has 1440 divisors, whose sum is σ = 64395365099520. Its totient is φ = 3741017702400.

The previous prime is 16831981731823. The next prime is 16831981731883. The reversal of 16831981731840 is 4813718913861.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

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, 542967152625 + ... + 542967152655.

Almost surely, 2^{16831981731840} is an apocalyptic number.

16831981731840 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 16831981731840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32197682549760).

16831981731840 is an abundant number, since it is smaller than the sum of its proper divisors (47563383367680).

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

16831981731840 is an frugal number, since it uses more digits than its factorization.

16831981731840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 60.

The spelling of 16831981731840 in words is "sixteen trillion, eight hundred thirty-one billion, nine hundred eighty-one million, seven hundred thirty-one thousand, eight hundred forty".