618806167193 has 2 divisors, whose sum is σ = 618806167194. Its totient is φ = 618806167192.

The previous prime is 618806167159. The next prime is 618806167237. The reversal of 618806167193 is 391761608816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605761786249 + 13044380944 = 778307^2 + 114212^2 .

It is a cyclic number.

It is not a de Polignac number, because 618806167193 - 2²² = 618801972889 is a prime.

It is not a weakly prime, because it can be changed into another prime (618806467193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309403083596 + 309403083597.

It is an arithmetic number, because the mean of its divisors is an integer number (309403083597).

Almost surely, 2^618806167193 is an apocalyptic number.

It is an amenable number.

618806167193 is a deficient number, since it is larger than the sum of its proper divisors (1).

618806167193 is an equidigital number, since it uses as much as digits as its factorization.

618806167193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The spelling of 618806167193 in words is "six hundred eighteen billion, eight hundred six million, one hundred sixty-seven thousand, one hundred ninety-three".