105605555061 has 4 divisors (see below), whose sum is σ = 140807406752. Its totient is φ = 70403703372.

The previous prime is 105605555059. The next prime is 105605555123. The reversal of 105605555061 is 160555506501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 105605555061 - 2¹ = 105605555059 is a prime.

It is a super-3 number, since 3×105605555061³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105605555021) 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, 17600925841 + ... + 17600925846.

It is an arithmetic number, because the mean of its divisors is an integer number (35201851688).

Almost surely, 2^105605555061 is an apocalyptic number.

It is an amenable number.

105605555061 is a deficient number, since it is larger than the sum of its proper divisors (35201851691).

105605555061 is an equidigital number, since it uses as much as digits as its factorization.

105605555061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35201851690.

The product of its (nonzero) digits is 112500, while the sum is 39.

The spelling of 105605555061 in words is "one hundred five billion, six hundred five million, five hundred fifty-five thousand, sixty-one".