16441465321 has 4 divisors (see below), whose sum is σ = 16442292100. Its totient is φ = 16440638544.

The previous prime is 16441465307. The next prime is 16441465333. The reversal of 16441465321 is 12356414461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13891215321 + 2550250000 = 117861^2 + 50500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16441465321 is a prime.

It is a super-3 number, since 3×16441465321³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16441465351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382806 + ... + 423583.

It is an arithmetic number, because the mean of its divisors is an integer number (4110573025).

Almost surely, 2^16441465321 is an apocalyptic number.

It is an amenable number.

16441465321 is a deficient number, since it is larger than the sum of its proper divisors (826779).

16441465321 is an equidigital number, since it uses as much as digits as its factorization.

16441465321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826778.

The product of its digits is 69120, while the sum is 37.

Adding to 16441465321 its reverse (12356414461), we get a palindrome (28797879782).

The spelling of 16441465321 in words is "sixteen billion, four hundred forty-one million, four hundred sixty-five thousand, three hundred twenty-one".