168105511 has 16 divisors (see below), whose sum is σ = 198190080. Its totient is φ = 139600800.

The previous prime is 168105491. The next prime is 168105563. The reversal of 168105511 is 115501861.

It is a cyclic number.

It is not a de Polignac number, because 168105511 - 2⁷ = 168105383 is a prime.

It is a super-2 number, since 2×168105511² = 56518925657142242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168105511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168105811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30700 + ... + 35758.

It is an arithmetic number, because the mean of its divisors is an integer number (12386880).

Almost surely, 2^168105511 is an apocalyptic number.

168105511 is a deficient number, since it is larger than the sum of its proper divisors (30084569).

168105511 is a wasteful number, since it uses less digits than its factorization.

168105511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5214.

The product of its (nonzero) digits is 1200, while the sum is 28.

The square root of 168105511 is about 12965.5509331459. The cubic root of 168105511 is about 551.9003257245.

The spelling of 168105511 in words is "one hundred sixty-eight million, one hundred five thousand, five hundred eleven".