655510105 has 4 divisors (see below), whose sum is σ = 786612132. Its totient is φ = 524408080.

The previous prime is 655510073. The next prime is 655510109. The reversal of 655510105 is 501015556.

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

It can be written as a sum of positive squares in 2 ways, for example, as 113039424 + 542470681 = 10632^2 + 23291^2 .

It is not a de Polignac number, because 655510105 - 2⁵ = 655510073 is a prime.

It is a super-3 number, since 3×655510105³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655510109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65551006 + ... + 65551015.

It is an arithmetic number, because the mean of its divisors is an integer number (196653033).

Almost surely, 2^655510105 is an apocalyptic number.

It is an amenable number.

655510105 is a deficient number, since it is larger than the sum of its proper divisors (131102027).

655510105 is a wasteful number, since it uses less digits than its factorization.

655510105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131102026.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 655510105 is about 25602.9315704276. The cubic root of 655510105 is about 868.6799485983.

The spelling of 655510105 in words is "six hundred fifty-five million, five hundred ten thousand, one hundred five".