168344168677 has 4 divisors (see below), whose sum is σ = 168795493900. Its totient is φ = 167892843456.

The previous prime is 168344168633. The next prime is 168344168683. The reversal of 168344168677 is 776861443861.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63423889281 + 104920279396 = 251841^2 + 323914^2 .

It is a cyclic number.

It is not a de Polignac number, because 168344168677 - 2¹⁵ = 168344135909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168344168627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225662052 + ... + 225662797.

It is an arithmetic number, because the mean of its divisors is an integer number (42198873475).

Almost surely, 2^168344168677 is an apocalyptic number.

It is an amenable number.

168344168677 is a deficient number, since it is larger than the sum of its proper divisors (451325223).

168344168677 is an equidigital number, since it uses as much as digits as its factorization.

168344168677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451325222.

The product of its digits is 32514048, while the sum is 61.

The spelling of 168344168677 in words is "one hundred sixty-eight billion, three hundred forty-four million, one hundred sixty-eight thousand, six hundred seventy-seven".