16464362221133 has 4 divisors (see below), whose sum is σ = 16610064541788. Its totient is φ = 16318659900480.

The previous prime is 16464362221129. The next prime is 16464362221199. The reversal of 16464362221133 is 33112226346461.

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 8972169548164 + 7492192672969 = 2995358^2 + 2737187^2 .

It is a cyclic number.

It is not a de Polignac number, because 16464362221133 - 2² = 16464362221129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16464362221633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72851160158 + ... + 72851160383.

It is an arithmetic number, because the mean of its divisors is an integer number (4152516135447).

Almost surely, 2^{16464362221133} is an apocalyptic number.

It is an amenable number.

16464362221133 is a deficient number, since it is larger than the sum of its proper divisors (145702320655).

16464362221133 is a wasteful number, since it uses less digits than its factorization.

16464362221133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145702320654.

The product of its digits is 746496, while the sum is 44.

Adding to 16464362221133 its reverse (33112226346461), we get a palindrome (49576588567594).

The spelling of 16464362221133 in words is "sixteen trillion, four hundred sixty-four billion, three hundred sixty-two million, two hundred twenty-one thousand, one hundred thirty-three".