16221600869 has 2 divisors, whose sum is σ = 16221600870. Its totient is φ = 16221600868.

The previous prime is 16221600853. The next prime is 16221600887. The reversal of 16221600869 is 96800612261.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16189508644 + 32092225 = 127238^2 + 5665^2 .

It is an emirp because it is prime and its reverse (96800612261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16221600869 - 2⁴ = 16221600853 is a prime.

It is a super-2 number, since 2×16221600869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16221602869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8110800434 + 8110800435.

It is an arithmetic number, because the mean of its divisors is an integer number (8110800435).

Almost surely, 2^16221600869 is an apocalyptic number.

It is an amenable number.

16221600869 is a deficient number, since it is larger than the sum of its proper divisors (1).

16221600869 is an equidigital number, since it uses as much as digits as its factorization.

16221600869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 16221600869 in words is "sixteen billion, two hundred twenty-one million, six hundred thousand, eight hundred sixty-nine".