16722181442 has 18 divisors (see below), whose sum is σ = 25518237849. Its totient is φ = 8218537320.

The previous prime is 16722181439. The next prime is 16722181451. The reversal of 16722181442 is 24418122761.

16722181442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11327132041 + 5395049401 = 106429^2 + 73451^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=91439.

It is a super-3 number, since 3×16722181442³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16722181396 and 16722181405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11154809 + ... + 11156307.

Almost surely, 2^16722181442 is an apocalyptic number.

16722181442 is a deficient number, since it is larger than the sum of its proper divisors (8796056407).

16722181442 is an frugal number, since it uses more digits than its factorization.

16722181442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3122 (or 1562 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The spelling of 16722181442 in words is "sixteen billion, seven hundred twenty-two million, one hundred eighty-one thousand, four hundred forty-two".