105681866555 has 16 divisors (see below), whose sum is σ = 131265018720. Its totient is φ = 81584251392.

The previous prime is 105681866509. The next prime is 105681866569. The reversal of 105681866555 is 555668186501.

It is a happy number.

It is not a de Polignac number, because 105681866555 - 2¹² = 105681862459 is a prime.

It is a super-2 number, since 2×105681866555² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105681866555.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 55187 + ... + 463043.

It is an arithmetic number, because the mean of its divisors is an integer number (8204063670).

Almost surely, 2^105681866555 is an apocalyptic number.

105681866555 is a deficient number, since it is larger than the sum of its proper divisors (25583152165).

105681866555 is a wasteful number, since it uses less digits than its factorization.

105681866555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409678.

The product of its (nonzero) digits is 8640000, while the sum is 56.

The spelling of 105681866555 in words is "one hundred five billion, six hundred eighty-one million, eight hundred sixty-six thousand, five hundred fifty-five".