168731356 has 6 divisors (see below), whose sum is σ = 295279880. Its totient is φ = 84365676.

The previous prime is 168731347. The next prime is 168731369. The reversal of 168731356 is 653137861.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21091416 + ... + 21091423.

Almost surely, 2^168731356 is an apocalyptic number.

It is an amenable number.

168731356 is a deficient number, since it is larger than the sum of its proper divisors (126548524).

168731356 is a wasteful number, since it uses less digits than its factorization.

168731356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42182843 (or 42182841 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 168731356 is about 12989.6634290500. The cubic root of 168731356 is about 552.5843729107.

The spelling of 168731356 in words is "one hundred sixty-eight million, seven hundred thirty-one thousand, three hundred fifty-six".