168654034866178 has 4 divisors (see below), whose sum is σ = 252981052299270. Its totient is φ = 84327017433088.

The previous prime is 168654034866059. The next prime is 168654034866211. The reversal of 168654034866178 is 871668430456861.

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., 166693998466009 + 1960036400169 = 12911003^2 + 1400013^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 168654034866178.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42163508716543 + ... + 42163508716546.

Almost surely, 2^{168654034866178} is an apocalyptic number.

168654034866178 is a deficient number, since it is larger than the sum of its proper divisors (84327017433092).

168654034866178 is an equidigital number, since it uses as much as digits as its factorization.

168654034866178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84327017433091.

The product of its (nonzero) digits is 1114767360, while the sum is 73.

The spelling of 168654034866178 in words is "one hundred sixty-eight trillion, six hundred fifty-four billion, thirty-four million, eight hundred sixty-six thousand, one hundred seventy-eight".