168512147578 has 4 divisors (see below), whose sum is σ = 252768221370. Its totient is φ = 84256073788.

The previous prime is 168512147569. The next prime is 168512147591. The reversal of 168512147578 is 875741215861.

168512147578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 875741215861 = 759037 ⋅1153753.

It can be written as a sum of positive squares in only one way, i.e., 168176268649 + 335878929 = 410093^2 + 18327^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 42128036893 + ... + 42128036896.

Almost surely, 2^168512147578 is an apocalyptic number.

168512147578 is a deficient number, since it is larger than the sum of its proper divisors (84256073792).

168512147578 is an equidigital number, since it uses as much as digits as its factorization.

168512147578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84256073791.

The product of its digits is 3763200, while the sum is 55.

The spelling of 168512147578 in words is "one hundred sixty-eight billion, five hundred twelve million, one hundred forty-seven thousand, five hundred seventy-eight".