16842874817 has 4 divisors (see below), whose sum is σ = 16935929556. Its totient is φ = 16749820080.

The previous prime is 16842874793. The next prime is 16842874847. The reversal of 16842874817 is 71847824861.

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 2924538241 + 13918336576 = 54079^2 + 117976^2 .

It is a cyclic number.

It is not a de Polignac number, because 16842874817 - 2⁸ = 16842874561 is a prime.

It is a super-2 number, since 2×16842874817² (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 (16842874847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46527098 + ... + 46527459.

It is an arithmetic number, because the mean of its divisors is an integer number (4233982389).

Almost surely, 2^16842874817 is an apocalyptic number.

It is an amenable number.

16842874817 is a deficient number, since it is larger than the sum of its proper divisors (93054739).

16842874817 is an equidigital number, since it uses as much as digits as its factorization.

16842874817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93054738.

The product of its digits is 4816896, while the sum is 56.

The spelling of 16842874817 in words is "sixteen billion, eight hundred forty-two million, eight hundred seventy-four thousand, eight hundred seventeen".