165563130116281 has 2 divisors, whose sum is σ = 165563130116282. Its totient is φ = 165563130116280.

The previous prime is 165563130116239. The next prime is 165563130116287. The reversal of 165563130116281 is 182611031365561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86066736710656 + 79496393405625 = 9277216^2 + 8916075^2 .

It is a cyclic number.

It is not a de Polignac number, because 165563130116281 - 2¹⁵ = 165563130083513 is a prime.

It is a super-2 number, since 2×165563130116281² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (165563130116287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82781565058140 + 82781565058141.

It is an arithmetic number, because the mean of its divisors is an integer number (82781565058141).

Almost surely, 2^{165563130116281} is an apocalyptic number.

It is an amenable number.

165563130116281 is a deficient number, since it is larger than the sum of its proper divisors (1).

165563130116281 is an equidigital number, since it uses as much as digits as its factorization.

165563130116281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 49.

The spelling of 165563130116281 in words is "one hundred sixty-five trillion, five hundred sixty-three billion, one hundred thirty million, one hundred sixteen thousand, two hundred eighty-one".