168073668531 has 12 divisors (see below), whose sum is σ = 243563872552. Its totient is φ = 111684129696.

The previous prime is 168073668527. The next prime is 168073668577. The reversal of 168073668531 is 135866370861.

168073668531 is a `hidden beast` number, since 16 + 8 + 0 + 7 + 36 + 68 + 531 = 666.

It is not a de Polignac number, because 168073668531 - 2² = 168073668527 is a prime.

It is a super-2 number, since 2×168073668531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168073661531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30412306 + ... + 30417831.

Almost surely, 2^168073668531 is an apocalyptic number.

168073668531 is a deficient number, since it is larger than the sum of its proper divisors (75490204021).

168073668531 is a wasteful number, since it uses less digits than its factorization.

168073668531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60830450 (or 60830447 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 168073668531 in words is "one hundred sixty-eight billion, seventy-three million, six hundred sixty-eight thousand, five hundred thirty-one".