16053561409 has 2 divisors, whose sum is σ = 16053561410. Its totient is φ = 16053561408.

The previous prime is 16053561379. The next prime is 16053561421. The reversal of 16053561409 is 90416535061.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14292919809 + 1760641600 = 119553^2 + 41960^2 .

It is a cyclic number.

It is not a de Polignac number, because 16053561409 - 2²¹ = 16051464257 is a prime.

It is not a weakly prime, because it can be changed into another prime (16053562409) 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, 8026780704 + 8026780705.

It is an arithmetic number, because the mean of its divisors is an integer number (8026780705).

Almost surely, 2^16053561409 is an apocalyptic number.

It is an amenable number.

16053561409 is a deficient number, since it is larger than the sum of its proper divisors (1).

16053561409 is an equidigital number, since it uses as much as digits as its factorization.

16053561409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 16053561409 in words is "sixteen billion, fifty-three million, five hundred sixty-one thousand, four hundred nine".