6395220791 has 2 divisors, whose sum is σ = 6395220792. Its totient is φ = 6395220790.

The previous prime is 6395220781. The next prime is 6395220809. The reversal of 6395220791 is 1970225936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6395220791 - 2¹⁴ = 6395204407 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6395220751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3197610395 + 3197610396.

It is an arithmetic number, because the mean of its divisors is an integer number (3197610396).

Almost surely, 2^6395220791 is an apocalyptic number.

6395220791 is a deficient number, since it is larger than the sum of its proper divisors (1).

6395220791 is an equidigital number, since it uses as much as digits as its factorization.

6395220791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 6395220791 is about 79970.1243652903. The cubic root of 6395220791 is about 1856.1732699622.

The spelling of 6395220791 in words is "six billion, three hundred ninety-five million, two hundred twenty thousand, seven hundred ninety-one".