84194789663 has 2 divisors, whose sum is σ = 84194789664. Its totient is φ = 84194789662.

The previous prime is 84194789599. The next prime is 84194789671. The reversal of 84194789663 is 36698749148.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84194789663 - 2⁶ = 84194789599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84194789663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84194783663) 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, 42097394831 + 42097394832.

It is an arithmetic number, because the mean of its divisors is an integer number (42097394832).

Almost surely, 2^84194789663 is an apocalyptic number.

84194789663 is a deficient number, since it is larger than the sum of its proper divisors (1).

84194789663 is an equidigital number, since it uses as much as digits as its factorization.

84194789663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62705664, while the sum is 65.

The spelling of 84194789663 in words is "eighty-four billion, one hundred ninety-four million, seven hundred eighty-nine thousand, six hundred sixty-three".