655542261 has 16 divisors (see below), whose sum is σ = 1059462720. Its totient is φ = 397298160.

The previous prime is 655542259. The next prime is 655542281. The reversal of 655542261 is 162245556.

655542261 is a `hidden beast` number, since 6 + 55 + 542 + 2 + 61 = 666.

It is not a de Polignac number, because 655542261 - 2¹ = 655542259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655542221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1103310 + ... + 1103903.

It is an arithmetic number, because the mean of its divisors is an integer number (66216420).

Almost surely, 2^655542261 is an apocalyptic number.

It is an amenable number.

655542261 is a deficient number, since it is larger than the sum of its proper divisors (403920459).

655542261 is a wasteful number, since it uses less digits than its factorization.

655542261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207233 (or 2207227 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 655542261 is about 25603.5595376893. The cubic root of 655542261 is about 868.6941527097.

The spelling of 655542261 in words is "six hundred fifty-five million, five hundred forty-two thousand, two hundred sixty-one".