6400195811 has 2 divisors, whose sum is σ = 6400195812. Its totient is φ = 6400195810.

The previous prime is 6400195801. The next prime is 6400195829. The reversal of 6400195811 is 1185910046.

6400195811 is digitally balanced in base 3, 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 6400195811 - 2¹⁸ = 6399933667 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (6400195801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200097905 + 3200097906.

It is an arithmetic number, because the mean of its divisors is an integer number (3200097906).

Almost surely, 2^6400195811 is an apocalyptic number.

6400195811 is a deficient number, since it is larger than the sum of its proper divisors (1).

6400195811 is an equidigital number, since it uses as much as digits as its factorization.

6400195811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 6400195811 is about 80001.2238093893. The cubic root of 6400195811 is about 1856.6544681302.

The spelling of 6400195811 in words is "six billion, four hundred million, one hundred ninety-five thousand, eight hundred eleven".