219638199811 has 2 divisors, whose sum is σ = 219638199812. Its totient is φ = 219638199810.

The previous prime is 219638199797. The next prime is 219638199857. The reversal of 219638199811 is 118991836912.

219638199811 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 219638199811 - 2²⁷ = 219503982083 is a prime.

It is not a weakly prime, because it can be changed into another prime (219638199211) 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, 109819099905 + 109819099906.

It is an arithmetic number, because the mean of its divisors is an integer number (109819099906).

Almost surely, 2^219638199811 is an apocalyptic number.

219638199811 is a deficient number, since it is larger than the sum of its proper divisors (1).

219638199811 is an equidigital number, since it uses as much as digits as its factorization.

219638199811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 58.

The spelling of 219638199811 in words is "two hundred nineteen billion, six hundred thirty-eight million, one hundred ninety-nine thousand, eight hundred eleven".