65832181161 has 4 divisors (see below), whose sum is σ = 87776241552. Its totient is φ = 43888120772.

The previous prime is 65832181123. The next prime is 65832181183. The reversal of 65832181161 is 16118123856.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65832181161 - 2²¹ = 65830084009 is a prime.

It is a super-3 number, since 3×65832181161³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (65832181111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10972030191 + ... + 10972030196.

It is an arithmetic number, because the mean of its divisors is an integer number (21944060388).

Almost surely, 2^65832181161 is an apocalyptic number.

It is an amenable number.

65832181161 is a deficient number, since it is larger than the sum of its proper divisors (21944060391).

65832181161 is a wasteful number, since it uses less digits than its factorization.

65832181161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21944060390.

The product of its digits is 69120, while the sum is 42.

The spelling of 65832181161 in words is "sixty-five billion, eight hundred thirty-two million, one hundred eighty-one thousand, one hundred sixty-one".