168408103687 has 4 divisors (see below), whose sum is σ = 168591356080. Its totient is φ = 168224851296.

The previous prime is 168408103679. The next prime is 168408103777. The reversal of 168408103687 is 786301804861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 168408103687 - 2³ = 168408103679 is a prime.

It is a super-2 number, since 2×168408103687² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168408103607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91624818 + ... + 91626655.

It is an arithmetic number, because the mean of its divisors is an integer number (42147839020).

Almost surely, 2^168408103687 is an apocalyptic number.

168408103687 is a deficient number, since it is larger than the sum of its proper divisors (183252393).

168408103687 is an equidigital number, since it uses as much as digits as its factorization.

168408103687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183252392.

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 168408103687 in words is "one hundred sixty-eight billion, four hundred eight million, one hundred three thousand, six hundred eighty-seven".