168508342449 has 6 divisors (see below), whose sum is σ = 243400939106. Its totient is φ = 112338894960.

The previous prime is 168508342441. The next prime is 168508342481. The reversal of 168508342449 is 944243805861.

168508342449 is a `hidden beast` number, since 1 + 6 + 85 + 0 + 83 + 42 + 449 = 666.

It can be written as a sum of positive squares in only one way, i.e., 100065934224 + 68442408225 = 316332^2 + 261615^2 .

It is not a de Polignac number, because 168508342449 - 2³ = 168508342441 is a prime.

It is a super-2 number, since 2×168508342449² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168508342395 and 168508342404.

It is not an unprimeable number, because it can be changed into a prime (168508342441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9361574572 + ... + 9361574589.

Almost surely, 2^168508342449 is an apocalyptic number.

It is an amenable number.

168508342449 is a deficient number, since it is larger than the sum of its proper divisors (74892596657).

168508342449 is a wasteful number, since it uses less digits than its factorization.

168508342449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18723149167 (or 18723149164 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 168508342449 in words is "one hundred sixty-eight billion, five hundred eight million, three hundred forty-two thousand, four hundred forty-nine".