6845771761 has 2 divisors, whose sum is σ = 6845771762. Its totient is φ = 6845771760.

The previous prime is 6845771747. The next prime is 6845771797. The reversal of 6845771761 is 1671775486.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4555575025 + 2290196736 = 67495^2 + 47856^2 .

It is a cyclic number.

It is not a de Polignac number, because 6845771761 - 2⁵ = 6845771729 is a prime.

It is a super-2 number, since 2×6845771761² = 93729182007410082242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6845771699 and 6845771708.

It is not a weakly prime, because it can be changed into another prime (6845771731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3422885880 + 3422885881.

It is an arithmetic number, because the mean of its divisors is an integer number (3422885881).

Almost surely, 2^6845771761 is an apocalyptic number.

It is an amenable number.

6845771761 is a deficient number, since it is larger than the sum of its proper divisors (1).

6845771761 is an equidigital number, since it uses as much as digits as its factorization.

6845771761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1975680, while the sum is 52.

The square root of 6845771761 is about 82739.1791172719. The cubic root of 6845771761 is about 1898.7777698893. Note that the first 4 decimals are identical.

The spelling of 6845771761 in words is "six billion, eight hundred forty-five million, seven hundred seventy-one thousand, seven hundred sixty-one".