16729094281 has 3 divisors (see below), whose sum is σ = 16729223623. Its totient is φ = 16728964940.

The previous prime is 16729094269. The next prime is 16729094303. The reversal of 16729094281 is 18249092761.

The square root of 16729094281 is 129341.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18249092761 = 2927 ⋅6234743.

It can be written as a sum of positive squares in only one way, i.e., 6709084281 + 10020010000 = 81909^2 + 100100^2 .

It is not a de Polignac number, because 16729094281 - 2¹³ = 16729086089 is a prime.

It is a super-2 number, since 2×16729094281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16729194281) 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, 64671 + ... + 194011.

Almost surely, 2^16729094281 is an apocalyptic number.

16729094281 is the 129341-st square number.

16729094281 is the 64671-st centered octagonal number.

It is an amenable number.

16729094281 is a deficient number, since it is larger than the sum of its proper divisors (129342).

16729094281 is an frugal number, since it uses more digits than its factorization.

16729094281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258682 (or 129341 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

Multiplying 16729094281 by its sum of digits (49), we get a square (819725619769 = 905387²).

The spelling of 16729094281 in words is "sixteen billion, seven hundred twenty-nine million, ninety-four thousand, two hundred eighty-one".