65873808171 has 20 divisors (see below), whose sum is σ = 99112043800. Its totient is φ = 43599923136.

The previous prime is 65873808047. The next prime is 65873808197. The reversal of 65873808171 is 17180837856.

It is a happy number.

It is not a de Polignac number, because 65873808171 - 2²³ = 65865419563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65873808571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2914126 + ... + 2936643.

It is an arithmetic number, because the mean of its divisors is an integer number (4955602190).

Almost surely, 2^65873808171 is an apocalyptic number.

65873808171 is a deficient number, since it is larger than the sum of its proper divisors (33238235629).

65873808171 is a wasteful number, since it uses less digits than its factorization.

65873808171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5850920 (or 5850911 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 54.

The spelling of 65873808171 in words is "sixty-five billion, eight hundred seventy-three million, eight hundred eight thousand, one hundred seventy-one".