16507223989 has 2 divisors, whose sum is σ = 16507223990. Its totient is φ = 16507223988.

The previous prime is 16507223987. The next prime is 16507224001. The reversal of 16507223989 is 98932270561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15139333764 + 1367890225 = 123042^2 + 36985^2 .

It is a cyclic number.

It is not a de Polignac number, because 16507223989 - 2¹ = 16507223987 is a prime.

Together with 16507223987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16507223981) 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 as a sum of consecutive naturals, namely, 8253611994 + 8253611995.

It is an arithmetic number, because the mean of its divisors is an integer number (8253611995).

Almost surely, 2^16507223989 is an apocalyptic number.

It is an amenable number.

16507223989 is a deficient number, since it is larger than the sum of its proper divisors (1).

16507223989 is an equidigital number, since it uses as much as digits as its factorization.

16507223989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 16507223989 in words is "sixteen billion, five hundred seven million, two hundred twenty-three thousand, nine hundred eighty-nine".