16320538477849 has 2 divisors, whose sum is σ = 16320538477850. Its totient is φ = 16320538477848.

The previous prime is 16320538477801. The next prime is 16320538477871. The reversal of 16320538477849 is 94877483502361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13486837588249 + 2833700889600 = 3672443^2 + 1683360^2 .

It is a cyclic number.

It is not a de Polignac number, because 16320538477849 - 2¹³ = 16320538469657 is a prime.

It is not a weakly prime, because it can be changed into another prime (16320538477249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8160269238924 + 8160269238925.

It is an arithmetic number, because the mean of its divisors is an integer number (8160269238925).

It is a 2-persistent number, because it is pandigital, and so is 2⋅16320538477849 = 32641076955698, but 3⋅16320538477849 = 48961615433547 is not.

Almost surely, 2^{16320538477849} is an apocalyptic number.

It is an amenable number.

16320538477849 is a deficient number, since it is larger than the sum of its proper divisors (1).

16320538477849 is an equidigital number, since it uses as much as digits as its factorization.

16320538477849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243855360, while the sum is 67.

The spelling of 16320538477849 in words is "sixteen trillion, three hundred twenty billion, five hundred thirty-eight million, four hundred seventy-seven thousand, eight hundred forty-nine".