168054678680389 has 2 divisors, whose sum is σ = 168054678680390. Its totient is φ = 168054678680388.

The previous prime is 168054678680359. The next prime is 168054678680393. The reversal of 168054678680389 is 983086876450861.

168054678680389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161304986348100 + 6749692332289 = 12700590^2 + 2598017^2 .

It is a cyclic number.

It is not a de Polignac number, because 168054678680389 - 2²⁷ = 168054544462661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168054678680359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84027339340194 + 84027339340195.

It is an arithmetic number, because the mean of its divisors is an integer number (84027339340195).

Almost surely, 2^{168054678680389} is an apocalyptic number.

It is an amenable number.

168054678680389 is a deficient number, since it is larger than the sum of its proper divisors (1).

168054678680389 is an equidigital number, since it uses as much as digits as its factorization.

168054678680389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3344302080, while the sum is 79.

The spelling of 168054678680389 in words is "one hundred sixty-eight trillion, fifty-four billion, six hundred seventy-eight million, six hundred eighty thousand, three hundred eighty-nine".