16734268321 has 3 divisors (see below), whose sum is σ = 16734397683. Its totient is φ = 16734138960.

The previous prime is 16734268307. The next prime is 16734268339. The reversal of 16734268321 is 12386243761.

The square root of 16734268321 is 129361.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 11515650721 + 5218617600 = 107311^2 + 72240^2 .

It is not a de Polignac number, because 16734268321 - 2¹³ = 16734260129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16734868321) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 64681 + ... + 194041.

It is an arithmetic number, because the mean of its divisors is an integer number (5578132561).

Almost surely, 2^16734268321 is an apocalyptic number.

16734268321 is the 129361-st square number.

16734268321 is the 64681-st centered octagonal number.

It is an amenable number.

16734268321 is a deficient number, since it is larger than the sum of its proper divisors (129362).

16734268321 is an frugal number, since it uses more digits than its factorization.

16734268321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258722 (or 129361 counting only the distinct ones).

The product of its digits is 290304, while the sum is 43.

The spelling of 16734268321 in words is "sixteen billion, seven hundred thirty-four million, two hundred sixty-eight thousand, three hundred twenty-one".