800705819549 has 2 divisors, whose sum is σ = 800705819550. Its totient is φ = 800705819548.

The previous prime is 800705819237. The next prime is 800705819609. The reversal of 800705819549 is 945918507008.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 785120044900 + 15585774649 = 886070^2 + 124843^2 .

It is a cyclic number.

It is not a de Polignac number, because 800705819549 - 2²⁸ = 800437384093 is a prime.

It is a super-2 number, since 2×800705819549² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 800705819494 and 800705819503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (800705812549) 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, 400352909774 + 400352909775.

It is an arithmetic number, because the mean of its divisors is an integer number (400352909775).

Almost surely, 2^800705819549 is an apocalyptic number.

It is an amenable number.

800705819549 is a deficient number, since it is larger than the sum of its proper divisors (1).

800705819549 is an equidigital number, since it uses as much as digits as its factorization.

800705819549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3628800, while the sum is 56.

The spelling of 800705819549 in words is "eight hundred billion, seven hundred five million, eight hundred nineteen thousand, five hundred forty-nine".