16674354281 has 4 divisors (see below), whose sum is σ = 17956996932. Its totient is φ = 15391711632.

The previous prime is 16674354271. The next prime is 16674354299. The reversal of 16674354281 is 18245347661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18245347661 = 379 ⋅48140759.

It can be written as a sum of positive squares in 2 ways, for example, as 2293547881 + 14380806400 = 47891^2 + 119920^2 .

It is a cyclic number.

It is not a de Polignac number, because 16674354281 - 2¹⁰ = 16674353257 is a prime.

It is a super-2 number, since 2×16674354281² (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 (16674354271) 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, 641321306 + ... + 641321331.

It is an arithmetic number, because the mean of its divisors is an integer number (4489249233).

Almost surely, 2^16674354281 is an apocalyptic number.

It is an amenable number.

16674354281 is a deficient number, since it is larger than the sum of its proper divisors (1282642651).

16674354281 is a wasteful number, since it uses less digits than its factorization.

16674354281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282642650.

The product of its digits is 967680, while the sum is 47.

The spelling of 16674354281 in words is "sixteen billion, six hundred seventy-four million, three hundred fifty-four thousand, two hundred eighty-one".