854720798549 has 2 divisors, whose sum is σ = 854720798550. Its totient is φ = 854720798548.

The previous prime is 854720798543. The next prime is 854720798557. The reversal of 854720798549 is 945897027458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 854409981649 + 310816900 = 924343^2 + 17630^2 .

It is a cyclic number.

It is not a de Polignac number, because 854720798549 - 2¹² = 854720794453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (854720798543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427360399274 + 427360399275.

It is an arithmetic number, because the mean of its divisors is an integer number (427360399275).

Almost surely, 2^854720798549 is an apocalyptic number.

It is an amenable number.

854720798549 is a deficient number, since it is larger than the sum of its proper divisors (1).

854720798549 is an equidigital number, since it uses as much as digits as its factorization.

854720798549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 203212800, while the sum is 68.

The spelling of 854720798549 in words is "eight hundred fifty-four billion, seven hundred twenty million, seven hundred ninety-eight thousand, five hundred forty-nine".