165380487017 has 2 divisors, whose sum is σ = 165380487018. Its totient is φ = 165380487016.

The previous prime is 165380486987. The next prime is 165380487023. The reversal of 165380487017 is 710784083561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144670686736 + 20709800281 = 380356^2 + 143909^2 .

It is a cyclic number.

It is not a de Polignac number, because 165380487017 - 2¹⁰ = 165380485993 is a prime.

It is not a weakly prime, because it can be changed into another prime (165380457017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82690243508 + 82690243509.

It is an arithmetic number, because the mean of its divisors is an integer number (82690243509).

Almost surely, 2^165380487017 is an apocalyptic number.

It is an amenable number.

165380487017 is a deficient number, since it is larger than the sum of its proper divisors (1).

165380487017 is an equidigital number, since it uses as much as digits as its factorization.

165380487017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 165380487017 in words is "one hundred sixty-five billion, three hundred eighty million, four hundred eighty-seven thousand, seventeen".