105505105556 has 12 divisors (see below), whose sum is σ = 187389665568. Its totient is φ = 51965201112.

The previous prime is 105505105547. The next prime is 105505105571. The reversal of 105505105556 is 655501505501.

It is a happy number.

It is a super-2 number, since 2×105505105556² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 196837616 + ... + 196838151.

It is an arithmetic number, because the mean of its divisors is an integer number (15615805464).

Almost surely, 2^105505105556 is an apocalyptic number.

It is an amenable number.

105505105556 is a deficient number, since it is larger than the sum of its proper divisors (81884560012).

105505105556 is a wasteful number, since it uses less digits than its factorization.

105505105556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393675838 (or 393675836 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 38.

The spelling of 105505105556 in words is "one hundred five billion, five hundred five million, one hundred five thousand, five hundred fifty-six".