111550165105 has 16 divisors (see below), whose sum is σ = 134211297744. Its totient is φ = 89006238720.

The previous prime is 111550165043. The next prime is 111550165127. The reversal of 111550165105 is 501561055111.

It can be written as a sum of positive squares in 8 ways, for example, as 485937936 + 111064227169 = 22044^2 + 333263^2 .

It is not a de Polignac number, because 111550165105 - 2¹⁷ = 111550034033 is a prime.

It is a super-2 number, since 2×111550165105² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

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, 6007135 + ... + 6025675.

It is an arithmetic number, because the mean of its divisors is an integer number (8388206109).

Almost surely, 2^111550165105 is an apocalyptic number.

It is an amenable number.

111550165105 is a deficient number, since it is larger than the sum of its proper divisors (22661132639).

111550165105 is a wasteful number, since it uses less digits than its factorization.

111550165105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21636.

The product of its (nonzero) digits is 3750, while the sum is 31.

The spelling of 111550165105 in words is "one hundred eleven billion, five hundred fifty million, one hundred sixty-five thousand, one hundred five".