16440421410505 has 8 divisors (see below), whose sum is σ = 20766848097600. Its totient is φ = 12460108858416.

The previous prime is 16440421410463. The next prime is 16440421410529. The reversal of 16440421410505 is 50501412404461.

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 16440421410505 - 2⁷ = 16440421410377 is a prime.

It is a super-3 number, since 3×16440421410505³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86528533645 + ... + 86528533834.

It is an arithmetic number, because the mean of its divisors is an integer number (2595856012200).

Almost surely, 2^{16440421410505} is an apocalyptic number.

It is an amenable number.

16440421410505 is a deficient number, since it is larger than the sum of its proper divisors (4326426687095).

16440421410505 is a wasteful number, since it uses less digits than its factorization.

16440421410505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173057067503.

The product of its (nonzero) digits is 76800, while the sum is 37.

Adding to 16440421410505 its reverse (50501412404461), we get a palindrome (66941833814966).

The spelling of 16440421410505 in words is "sixteen trillion, four hundred forty billion, four hundred twenty-one million, four hundred ten thousand, five hundred five".