65338170739209 has 9 divisors (see below), whose sum is σ = 94377392761639. Its totient is φ = 43558764326400.

The previous prime is 65338170739187. The next prime is 65338170739217. The reversal of 65338170739209 is 90293707183356.

The square root of 65338170739209 is 8083203.

It is a perfect power (a square), and thus also a powerful number.

65338170739209 is a `hidden beast` number, since 6 + 533 + 8 + 1 + 7 + 0 + 7 + 3 + 92 + 0 + 9 = 666.

65338170739209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10739076364809 + 54599094374400 = 3277053^2 + 7389120^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 65338170739209 - 2²⁷ = 65338036521481 is a prime.

It is a super-2 number, since 2×65338170739209² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65338170734209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22902409 + ... + 25596809.

Almost surely, 2^{65338170739209} is an apocalyptic number.

65338170739209 is the 8083203-rd square number.

65338170739209 is the 4041602-nd centered octagonal number.

It is an amenable number.

65338170739209 is a deficient number, since it is larger than the sum of its proper divisors (29039222022430).

65338170739209 is an frugal number, since it uses more digits than its factorization.

65338170739209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5388808 (or 2694404 counting only the distinct ones).

The product of its (nonzero) digits is 51438240, while the sum is 63.

The spelling of 65338170739209 in words is "sixty-five trillion, three hundred thirty-eight billion, one hundred seventy million, seven hundred thirty-nine thousand, two hundred nine".