16363944281 has 4 divisors (see below), whose sum is σ = 16365683364. Its totient is φ = 16362205200.

The previous prime is 16363944263. The next prime is 16363944283. The reversal of 16363944281 is 18244936361.

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 14918423881 + 1445520400 = 122141^2 + 38020^2 .

It is a cyclic number.

It is not a de Polignac number, because 16363944281 - 2¹⁰ = 16363943257 is a prime.

It is a super-2 number, since 2×16363944281² (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 (16363944283) 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, 855350 + ... + 874271.

It is an arithmetic number, because the mean of its divisors is an integer number (4091420841).

Almost surely, 2^16363944281 is an apocalyptic number.

It is an amenable number.

16363944281 is a deficient number, since it is larger than the sum of its proper divisors (1739083).

16363944281 is an equidigital number, since it uses as much as digits as its factorization.

16363944281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739082.

The product of its digits is 746496, while the sum is 47.

The spelling of 16363944281 in words is "sixteen billion, three hundred sixty-three million, nine hundred forty-four thousand, two hundred eighty-one".