805518846667 has 2 divisors, whose sum is σ = 805518846668. Its totient is φ = 805518846666.

The previous prime is 805518846661. The next prime is 805518846709. The reversal of 805518846667 is 766648815508.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 805518846667 - 2¹⁹ = 805518322379 is a prime.

It is a super-2 number, since 2×805518846667² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 805518846599 and 805518846608.

It is not a weakly prime, because it can be changed into another prime (805518846661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402759423333 + 402759423334.

It is an arithmetic number, because the mean of its divisors is an integer number (402759423334).

Almost surely, 2^805518846667 is an apocalyptic number.

805518846667 is a deficient number, since it is larger than the sum of its proper divisors (1).

805518846667 is an equidigital number, since it uses as much as digits as its factorization.

805518846667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77414400, while the sum is 64.

The spelling of 805518846667 in words is "eight hundred five billion, five hundred eighteen million, eight hundred forty-six thousand, six hundred sixty-seven".