168809168546 has 4 divisors (see below), whose sum is σ = 253213752822. Its totient is φ = 84404584272.

The previous prime is 168809168467. The next prime is 168809168569. The reversal of 168809168546 is 645861908861.

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

It can be written as a sum of positive squares in only one way, i.e., 156534966025 + 12274202521 = 395645^2 + 110789^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 42202292135 + ... + 42202292138.

Almost surely, 2^168809168546 is an apocalyptic number.

168809168546 is a deficient number, since it is larger than the sum of its proper divisors (84404584276).

168809168546 is an equidigital number, since it uses as much as digits as its factorization.

168809168546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84404584275.

The product of its (nonzero) digits is 19906560, while the sum is 62.

The spelling of 168809168546 in words is "one hundred sixty-eight billion, eight hundred nine million, one hundred sixty-eight thousand, five hundred forty-six".