655216105105 has 8 divisors (see below), whose sum is σ = 786372061032. Its totient is φ = 524097727488.

The previous prime is 655216105091. The next prime is 655216105109. The reversal of 655216105105 is 501501612556.

It can be written as a sum of positive squares in 4 ways, for example, as 27685964881 + 627530140224 = 166391^2 + 792168^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 655216105105 - 2⁵ = 655216105073 is a prime.

It is a super-2 number, since 2×655216105105² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655216105109) 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 7 ways as a sum of consecutive naturals, for example, 9356202 + ... + 9425971.

It is an arithmetic number, because the mean of its divisors is an integer number (98296507629).

Almost surely, 2^655216105105 is an apocalyptic number.

It is an amenable number.

655216105105 is a deficient number, since it is larger than the sum of its proper divisors (131155955927).

655216105105 is a wasteful number, since it uses less digits than its factorization.

655216105105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18789155.

The product of its (nonzero) digits is 45000, while the sum is 37.

The spelling of 655216105105 in words is "six hundred fifty-five billion, two hundred sixteen million, one hundred five thousand, one hundred five".