16321995244320 has 384 divisors, whose sum is σ = 55312550092800. Its totient is φ = 4032742920192.

The previous prime is 16321995244319. The next prime is 16321995244327. The reversal of 16321995244320 is 2344259912361.

It is not an unprimeable number, because it can be changed into a prime (16321995244327) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 612513237 + ... + 612539883.

It is an arithmetic number, because the mean of its divisors is an integer number (144043099200).

Almost surely, 2^{16321995244320} is an apocalyptic number.

16321995244320 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 16321995244320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27656275046400).

16321995244320 is an abundant number, since it is smaller than the sum of its proper divisors (38990554848480).

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

16321995244320 is a wasteful number, since it uses less digits than its factorization.

16321995244320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28160 (or 28152 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 16321995244320 in words is "sixteen trillion, three hundred twenty-one billion, nine hundred ninety-five million, two hundred forty-four thousand, three hundred twenty".