208736306065 has 16 divisors (see below), whose sum is σ = 286919043840. Its totient is φ = 142807412160.

The previous prime is 208736306059. The next prime is 208736306101. The reversal of 208736306065 is 560603637802.

It is not a de Polignac number, because 208736306065 - 2¹³ = 208736297873 is a prime.

It is a super-2 number, since 2×208736306065² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6777226 + ... + 6807955.

It is an arithmetic number, because the mean of its divisors is an integer number (17932440240).

Almost surely, 2^208736306065 is an apocalyptic number.

It is an amenable number.

208736306065 is a deficient number, since it is larger than the sum of its proper divisors (78182737775).

208736306065 is a wasteful number, since it uses less digits than its factorization.

208736306065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13585632.

The product of its (nonzero) digits is 1088640, while the sum is 46.

The spelling of 208736306065 in words is "two hundred eight billion, seven hundred thirty-six million, three hundred six thousand, sixty-five".