168355685507 has 8 divisors (see below), whose sum is σ = 177241436160. Its totient is φ = 159472427400.

The previous prime is 168355685501. The next prime is 168355685521. The reversal of 168355685507 is 705586553861.

168355685507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 168355685507 - 2¹⁸ = 168355423363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168355685501) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 483683 + ... + 755420.

It is an arithmetic number, because the mean of its divisors is an integer number (22155179520).

Almost surely, 2^168355685507 is an apocalyptic number.

168355685507 is a deficient number, since it is larger than the sum of its proper divisors (8885750653).

168355685507 is a wasteful number, since it uses less digits than its factorization.

168355685507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246273.

The product of its (nonzero) digits is 30240000, while the sum is 59.

The spelling of 168355685507 in words is "one hundred sixty-eight billion, three hundred fifty-five million, six hundred eighty-five thousand, five hundred seven".