198655556903 has 2 divisors, whose sum is σ = 198655556904. Its totient is φ = 198655556902.

The previous prime is 198655556851. The next prime is 198655556929. The reversal of 198655556903 is 309655556891.

198655556903 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 is a cyclic number.

It is not a de Polignac number, because 198655556903 - 2¹⁸ = 198655294759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198655556933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99327778451 + 99327778452.

It is an arithmetic number, because the mean of its divisors is an integer number (99327778452).

Almost surely, 2^198655556903 is an apocalyptic number.

198655556903 is a deficient number, since it is larger than the sum of its proper divisors (1).

198655556903 is an equidigital number, since it uses as much as digits as its factorization.

198655556903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43740000, while the sum is 62.

The spelling of 198655556903 in words is "one hundred ninety-eight billion, six hundred fifty-five million, five hundred fifty-six thousand, nine hundred three".