398933655563 has 2 divisors, whose sum is σ = 398933655564. Its totient is φ = 398933655562.

The previous prime is 398933655511. The next prime is 398933655607. The reversal of 398933655563 is 365556339893.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (365556339893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398933655563 - 2²⁶ = 398866546699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 398933655563.

It is not a weakly prime, because it can be changed into another prime (398993655563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199466827781 + 199466827782.

It is an arithmetic number, because the mean of its divisors is an integer number (199466827782).

Almost surely, 2^398933655563 is an apocalyptic number.

398933655563 is a deficient number, since it is larger than the sum of its proper divisors (1).

398933655563 is an equidigital number, since it uses as much as digits as its factorization.

398933655563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236196000, while the sum is 65.

The spelling of 398933655563 in words is "three hundred ninety-eight billion, nine hundred thirty-three million, six hundred fifty-five thousand, five hundred sixty-three".