16192746221 has 2 divisors, whose sum is σ = 16192746222. Its totient is φ = 16192746220.

The previous prime is 16192746217. The next prime is 16192746223. The reversal of 16192746221 is 12264729161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12600062500 + 3592683721 = 112250^2 + 59939^2 .

It is an emirp because it is prime and its reverse (12264729161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16192746221 - 2² = 16192746217 is a prime.

Together with 16192746223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16192746223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8096373110 + 8096373111.

It is an arithmetic number, because the mean of its divisors is an integer number (8096373111).

Almost surely, 2^16192746221 is an apocalyptic number.

It is an amenable number.

16192746221 is a deficient number, since it is larger than the sum of its proper divisors (1).

16192746221 is an equidigital number, since it uses as much as digits as its factorization.

16192746221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The spelling of 16192746221 in words is "sixteen billion, one hundred ninety-two million, seven hundred forty-six thousand, two hundred twenty-one".