398178038180063 has 2 divisors, whose sum is σ = 398178038180064. Its totient is φ = 398178038180062.

The previous prime is 398178038179991. The next prime is 398178038180099. The reversal of 398178038180063 is 360081830871893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398178038180063 - 2⁸ = 398178038179807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398178038180563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199089019090031 + 199089019090032.

It is an arithmetic number, because the mean of its divisors is an integer number (199089019090032).

Almost surely, 2^{398178038180063} is an apocalyptic number.

398178038180063 is a deficient number, since it is larger than the sum of its proper divisors (1).

398178038180063 is an equidigital number, since it uses as much as digits as its factorization.

398178038180063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41803776, while the sum is 65.

The spelling of 398178038180063 in words is "three hundred ninety-eight trillion, one hundred seventy-eight billion, thirty-eight million, one hundred eighty thousand, sixty-three".