16505644163 has 2 divisors, whose sum is σ = 16505644164. Its totient is φ = 16505644162.

The previous prime is 16505644153. The next prime is 16505644171. The reversal of 16505644163 is 36144650561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16505644163 - 2¹⁴ = 16505627779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16505644163.

It is not a weakly prime, because it can be changed into another prime (16505644153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8252822081 + 8252822082.

It is an arithmetic number, because the mean of its divisors is an integer number (8252822082).

Almost surely, 2^16505644163 is an apocalyptic number.

16505644163 is a deficient number, since it is larger than the sum of its proper divisors (1).

16505644163 is an equidigital number, since it uses as much as digits as its factorization.

16505644163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 16505644163 in words is "sixteen billion, five hundred five million, six hundred forty-four thousand, one hundred sixty-three".