165281055208 has 8 divisors (see below), whose sum is σ = 309901978530. Its totient is φ = 82640527600.

The previous prime is 165281055193. The next prime is 165281055283. The reversal of 165281055208 is 802550182561.

It can be written as a sum of positive squares in only one way, i.e., 162036841444 + 3244213764 = 402538^2 + 56958^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10330065943 + ... + 10330065958.

Almost surely, 2^165281055208 is an apocalyptic number.

It is an amenable number.

165281055208 is a deficient number, since it is larger than the sum of its proper divisors (144620923322).

165281055208 is a wasteful number, since it uses less digits than its factorization.

165281055208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20660131907 (or 20660131903 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 43.

The spelling of 165281055208 in words is "one hundred sixty-five billion, two hundred eighty-one million, fifty-five thousand, two hundred eight".