16321300621 has 8 divisors (see below), whose sum is σ = 16786985184. Its totient is φ = 15856909200.

The previous prime is 16321300609. The next prime is 16321300643. The reversal of 16321300621 is 12600312361.

16321300621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16321300621 - 2⁷ = 16321300493 is a prime.

It is a super-2 number, since 2×16321300621² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16321300321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297655 + ... + 348196.

It is an arithmetic number, because the mean of its divisors is an integer number (2098373148).

Almost surely, 2^16321300621 is an apocalyptic number.

It is an amenable number.

16321300621 is a deficient number, since it is larger than the sum of its proper divisors (465684563).

16321300621 is an equidigital number, since it uses as much as digits as its factorization.

16321300621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646571.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 16321300621 its reverse (12600312361), we get a palindrome (28921612982).

The spelling of 16321300621 in words is "sixteen billion, three hundred twenty-one million, three hundred thousand, six hundred twenty-one".