168516720187 has 32 divisors (see below), whose sum is σ = 179040020544. Its totient is φ = 158392166400.

The previous prime is 168516720149. The next prime is 168516720277. The reversal of 168516720187 is 781027615861.

168516720187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 168516720187 - 2¹⁹ = 168516195899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168516720287) 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 31 ways as a sum of consecutive naturals, for example, 153615423 + ... + 153616519.

It is an arithmetic number, because the mean of its divisors is an integer number (5595000642).

Almost surely, 2^168516720187 is an apocalyptic number.

168516720187 is a deficient number, since it is larger than the sum of its proper divisors (10523300357).

168516720187 is a wasteful number, since it uses less digits than its factorization.

168516720187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079.

The product of its (nonzero) digits is 1128960, while the sum is 52.

The spelling of 168516720187 in words is "one hundred sixty-eight billion, five hundred sixteen million, seven hundred twenty thousand, one hundred eighty-seven".