105855556081 has 8 divisors (see below), whose sum is σ = 119460816000. Its totient is φ = 92913967440.

The previous prime is 105855556073. The next prime is 105855556087. The reversal of 105855556081 is 180655558501.

It is a happy number.

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 105855556081 - 2³ = 105855556073 is a prime.

It is a super-2 number, since 2×105855556081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105855556087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165917481 + ... + 165918118.

It is an arithmetic number, because the mean of its divisors is an integer number (14932602000).

Almost surely, 2^105855556081 is an apocalyptic number.

105855556081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

105855556081 is a deficient number, since it is larger than the sum of its proper divisors (13605259919).

105855556081 is a wasteful number, since it uses less digits than its factorization.

105855556081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331835639.

The product of its (nonzero) digits is 1200000, while the sum is 49.

The spelling of 105855556081 in words is "one hundred five billion, eight hundred fifty-five million, five hundred fifty-six thousand, eighty-one".