1165065411281 has 2 divisors, whose sum is σ = 1165065411282. Its totient is φ = 1165065411280.

The previous prime is 1165065411277. The next prime is 1165065411317. The reversal of 1165065411281 is 1821145605611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1088068041025 + 76997370256 = 1043105^2 + 277484^2 .

It is a cyclic number.

It is not a de Polignac number, because 1165065411281 - 2² = 1165065411277 is a prime.

It is a super-2 number, since 2×1165065411281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1165065111281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582532705640 + 582532705641.

It is an arithmetic number, because the mean of its divisors is an integer number (582532705641).

Almost surely, 2^{1165065411281} is an apocalyptic number.

It is an amenable number.

1165065411281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165065411281 is an equidigital number, since it uses as much as digits as its factorization.

1165065411281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 41.

The spelling of 1165065411281 in words is "one trillion, one hundred sixty-five billion, sixty-five million, four hundred eleven thousand, two hundred eighty-one".