168343827505 has 16 divisors (see below), whose sum is σ = 232914651264. Its totient is φ = 114414209280.

The previous prime is 168343827503. The next prime is 168343827511. The reversal of 168343827505 is 505728343861.

It is a happy number.

It is not a de Polignac number, because 168343827505 - 2¹ = 168343827503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168343827503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21278451 + ... + 21286360.

It is an arithmetic number, because the mean of its divisors is an integer number (14557165704).

Almost surely, 2^168343827505 is an apocalyptic number.

It is an amenable number.

168343827505 is a deficient number, since it is larger than the sum of its proper divisors (64570823759).

168343827505 is a wasteful number, since it uses less digits than its factorization.

168343827505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42564936.

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 168343827505 in words is "one hundred sixty-eight billion, three hundred forty-three million, eight hundred twenty-seven thousand, five hundred five".