198400756247 has 2 divisors, whose sum is σ = 198400756248. Its totient is φ = 198400756246.

The previous prime is 198400756241. The next prime is 198400756261. The reversal of 198400756247 is 742657004891.

198400756247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198400756247 - 2¹⁴ = 198400739863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198400756241) 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, 99200378123 + 99200378124.

It is an arithmetic number, because the mean of its divisors is an integer number (99200378124).

Almost surely, 2^198400756247 is an apocalyptic number.

198400756247 is a deficient number, since it is larger than the sum of its proper divisors (1).

198400756247 is an equidigital number, since it uses as much as digits as its factorization.

198400756247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 198400756247 in words is "one hundred ninety-eight billion, four hundred million, seven hundred fifty-six thousand, two hundred forty-seven".