398566179911 has 2 divisors, whose sum is σ = 398566179912. Its totient is φ = 398566179910.

The previous prime is 398566179829. The next prime is 398566179941. The reversal of 398566179911 is 119971665893.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398566179911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398566179941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199283089955 + 199283089956.

It is an arithmetic number, because the mean of its divisors is an integer number (199283089956).

Almost surely, 2^398566179911 is an apocalyptic number.

398566179911 is a deficient number, since it is larger than the sum of its proper divisors (1).

398566179911 is an equidigital number, since it uses as much as digits as its factorization.

398566179911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22044960, while the sum is 65.

The spelling of 398566179911 in words is "three hundred ninety-eight billion, five hundred sixty-six million, one hundred seventy-nine thousand, nine hundred eleven".