16405065653 has 2 divisors, whose sum is σ = 16405065654. Its totient is φ = 16405065652.

The previous prime is 16405065647. The next prime is 16405065667. The reversal of 16405065653 is 35656050461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15830169124 + 574896529 = 125818^2 + 23977^2 .

It is a cyclic number.

It is not a de Polignac number, because 16405065653 - 2³⁰ = 15331323829 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16405065653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16405065953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8202532826 + 8202532827.

It is an arithmetic number, because the mean of its divisors is an integer number (8202532827).

Almost surely, 2^16405065653 is an apocalyptic number.

It is an amenable number.

16405065653 is a deficient number, since it is larger than the sum of its proper divisors (1).

16405065653 is an equidigital number, since it uses as much as digits as its factorization.

16405065653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 16405065653 in words is "sixteen billion, four hundred five million, sixty-five thousand, six hundred fifty-three".