805287735436853 has 2 divisors, whose sum is σ = 805287735436854. Its totient is φ = 805287735436852.

The previous prime is 805287735436787. The next prime is 805287735436861. The reversal of 805287735436853 is 358634537782508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 736571295183409 + 68716440253444 = 27139847^2 + 8289538^2 .

It is a cyclic number.

It is not a de Polignac number, because 805287735436853 - 2⁴⁰ = 804188223809077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (805287735486853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402643867718426 + 402643867718427.

It is an arithmetic number, because the mean of its divisors is an integer number (402643867718427).

Almost surely, 2^{805287735436853} is an apocalyptic number.

It is an amenable number.

805287735436853 is a deficient number, since it is larger than the sum of its proper divisors (1).

805287735436853 is an equidigital number, since it uses as much as digits as its factorization.

805287735436853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4064256000, while the sum is 74.

The spelling of 805287735436853 in words is "eight hundred five trillion, two hundred eighty-seven billion, seven hundred thirty-five million, four hundred thirty-six thousand, eight hundred fifty-three".