655065612171 has 24 divisors (see below), whose sum is σ = 951941636880. Its totient is φ = 434068588800.

The previous prime is 655065612137. The next prime is 655065612221. The reversal of 655065612171 is 171216560556.

It is a happy number.

655065612171 is a `hidden beast` number, since 6 + 5 + 506 + 56 + 1 + 21 + 71 = 666.

It is not a de Polignac number, because 655065612171 - 2¹⁰ = 655065611147 is a prime.

It is a super-2 number, since 2×655065612171² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (655065612121) 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 23 ways as a sum of consecutive naturals, for example, 1218495 + ... + 1671783.

It is an arithmetic number, because the mean of its divisors is an integer number (39664234870).

Almost surely, 2^655065612171 is an apocalyptic number.

655065612171 is a deficient number, since it is larger than the sum of its proper divisors (296876024709).

655065612171 is a wasteful number, since it uses less digits than its factorization.

655065612171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454267 (or 454264 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The spelling of 655065612171 in words is "six hundred fifty-five billion, sixty-five million, six hundred twelve thousand, one hundred seventy-one".