655806271 has 4 divisors (see below), whose sum is σ = 676961344. Its totient is φ = 634651200.

The previous prime is 655806191. The next prime is 655806293. The reversal of 655806271 is 172608556.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 655806271 - 2¹³ = 655798079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655801271) 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 3 ways as a sum of consecutive naturals, for example, 10577490 + ... + 10577551.

It is an arithmetic number, because the mean of its divisors is an integer number (169240336).

Almost surely, 2^655806271 is an apocalyptic number.

655806271 is a deficient number, since it is larger than the sum of its proper divisors (21155073).

655806271 is a wasteful number, since it uses less digits than its factorization.

655806271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21155072.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 655806271 is about 25608.7147471325. The cubic root of 655806271 is about 868.8107549871.

The spelling of 655806271 in words is "six hundred fifty-five million, eight hundred six thousand, two hundred seventy-one".