16991285919744 has 240 divisors, whose sum is σ = 47356986458880. Its totient is φ = 5408536657920.

The previous prime is 16991285919743. The next prime is 16991285919793. The reversal of 16991285919744 is 44791958219961.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16991285919743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 699764884 + ... + 699789164.

It is an arithmetic number, because the mean of its divisors is an integer number (197320776912).

Almost surely, 2^{16991285919744} 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 16991285919744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23678493229440).

16991285919744 is an abundant number, since it is smaller than the sum of its proper divisors (30365700539136).

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

16991285919744 is an equidigital number, since it uses as much as digits as its factorization.

16991285919744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24954 (or 24928 counting only the distinct ones).

The product of its digits is 352719360, while the sum is 75.

The spelling of 16991285919744 in words is "sixteen trillion, nine hundred ninety-one billion, two hundred eighty-five million, nine hundred nineteen thousand, seven hundred forty-four".