194097780563 has 2 divisors, whose sum is σ = 194097780564. Its totient is φ = 194097780562.

The previous prime is 194097780511. The next prime is 194097780589. The reversal of 194097780563 is 365087790491.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194097780563 is a prime.

It is not a weakly prime, because it can be changed into another prime (194097740563) 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, 97048890281 + 97048890282.

It is an arithmetic number, because the mean of its divisors is an integer number (97048890282).

Almost surely, 2^194097780563 is an apocalyptic number.

194097780563 is a deficient number, since it is larger than the sum of its proper divisors (1).

194097780563 is an equidigital number, since it uses as much as digits as its factorization.

194097780563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11430720, while the sum is 59.

The spelling of 194097780563 in words is "one hundred ninety-four billion, ninety-seven million, seven hundred eighty thousand, five hundred sixty-three".