165287945671 has 2 divisors, whose sum is σ = 165287945672. Its totient is φ = 165287945670.

The previous prime is 165287945663. The next prime is 165287945717. The reversal of 165287945671 is 176549782561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165287945671 - 2³ = 165287945663 is a prime.

It is a super-3 number, since 3×165287945671³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165287945071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82643972835 + 82643972836.

It is an arithmetic number, because the mean of its divisors is an integer number (82643972836).

Almost surely, 2^165287945671 is an apocalyptic number.

165287945671 is a deficient number, since it is larger than the sum of its proper divisors (1).

165287945671 is an equidigital number, since it uses as much as digits as its factorization.

165287945671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25401600, while the sum is 61.

The spelling of 165287945671 in words is "one hundred sixty-five billion, two hundred eighty-seven million, nine hundred forty-five thousand, six hundred seventy-one".