16434633465221 has 8 divisors (see below), whose sum is σ = 17639751633624. Its totient is φ = 15256001410560.

The previous prime is 16434633465199. The next prime is 16434633465227. The reversal of 16434633465221 is 12256433643461.

It can be written as a sum of positive squares in 4 ways, for example, as 7307890362721 + 9126743102500 = 2703311^2 + 3021050^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-16434633465221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16434633465221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16434633465227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6621527150 + ... + 6621529631.

It is an arithmetic number, because the mean of its divisors is an integer number (2204968954203).

Almost surely, 2^{16434633465221} is an apocalyptic number.

It is an amenable number.

16434633465221 is a deficient number, since it is larger than the sum of its proper divisors (1205118168403).

16434633465221 is a wasteful number, since it uses less digits than its factorization.

16434633465221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13243056871.

The product of its digits is 7464960, while the sum is 50.

The spelling of 16434633465221 in words is "sixteen trillion, four hundred thirty-four billion, six hundred thirty-three million, four hundred sixty-five thousand, two hundred twenty-one".