806711345261 has 2 divisors, whose sum is σ = 806711345262. Its totient is φ = 806711345260.

The previous prime is 806711345257. The next prime is 806711345281. The reversal of 806711345261 is 162543117608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 707095992100 + 99615353161 = 840890^2 + 315619^2 .

It is a cyclic number.

It is not a de Polignac number, because 806711345261 - 2² = 806711345257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (806711345281) 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, 403355672630 + 403355672631.

It is an arithmetic number, because the mean of its divisors is an integer number (403355672631).

Almost surely, 2^806711345261 is an apocalyptic number.

It is an amenable number.

806711345261 is a deficient number, since it is larger than the sum of its proper divisors (1).

806711345261 is an equidigital number, since it uses as much as digits as its factorization.

806711345261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 806711345261 in words is "eight hundred six billion, seven hundred eleven million, three hundred forty-five thousand, two hundred sixty-one".