168642071361 has 20 divisors (see below), whose sum is σ = 252178504512. Its totient is φ = 112313622168.

The previous prime is 168642071359. The next prime is 168642071369. The reversal of 168642071361 is 163170246861.

168642071361 is a `hidden beast` number, since 1 + 6 + 86 + 4 + 207 + 1 + 361 = 666.

168642071361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 168642071361 - 2¹ = 168642071359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168642071369) 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 19 ways as a sum of consecutive naturals, for example, 979381 + ... + 1138626.

Almost surely, 2^168642071361 is an apocalyptic number.

It is an amenable number.

168642071361 is a deficient number, since it is larger than the sum of its proper divisors (83536433151).

168642071361 is an equidigital number, since it uses as much as digits as its factorization.

168642071361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2119002 (or 2118993 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 168642071361 in words is "one hundred sixty-eight billion, six hundred forty-two million, seventy-one thousand, three hundred sixty-one".