811948398799 has 2 divisors, whose sum is σ = 811948398800. Its totient is φ = 811948398798.

The previous prime is 811948398713. The next prime is 811948398853. The reversal of 811948398799 is 997893849118.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 811948398799 - 2¹⁹ = 811947874511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (811948392799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405974199399 + 405974199400.

It is an arithmetic number, because the mean of its divisors is an integer number (405974199400).

Almost surely, 2^811948398799 is an apocalyptic number.

811948398799 is a deficient number, since it is larger than the sum of its proper divisors (1).

811948398799 is an equidigital number, since it uses as much as digits as its factorization.

811948398799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282175488, while the sum is 76.

The spelling of 811948398799 in words is "eight hundred eleven billion, nine hundred forty-eight million, three hundred ninety-eight thousand, seven hundred ninety-nine".