16881638353 has 2 divisors, whose sum is σ = 16881638354. Its totient is φ = 16881638352.

The previous prime is 16881638351. The next prime is 16881638383. The reversal of 16881638353 is 35383618861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10448315089 + 6433323264 = 102217^2 + 80208^2 .

It is a cyclic number.

It is not a de Polignac number, because 16881638353 - 2¹ = 16881638351 is a prime.

Together with 16881638351, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 16881638353.

It is not a weakly prime, because it can be changed into another prime (16881638351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8440819176 + 8440819177.

It is an arithmetic number, because the mean of its divisors is an integer number (8440819177).

Almost surely, 2^16881638353 is an apocalyptic number.

It is an amenable number.

16881638353 is a deficient number, since it is larger than the sum of its proper divisors (1).

16881638353 is an equidigital number, since it uses as much as digits as its factorization.

16881638353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2488320, while the sum is 52.

The spelling of 16881638353 in words is "sixteen billion, eight hundred eighty-one million, six hundred thirty-eight thousand, three hundred fifty-three".