854772082981 has 2 divisors, whose sum is σ = 854772082982. Its totient is φ = 854772082980.

The previous prime is 854772082963. The next prime is 854772083027. The reversal of 854772082981 is 189280277458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 506395908225 + 348376174756 = 711615^2 + 590234^2 .

It is a cyclic number.

It is not a de Polignac number, because 854772082981 - 2⁵ = 854772082949 is a prime.

It is a super-2 number, since 2×854772082981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (854772082951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427386041490 + 427386041491.

It is an arithmetic number, because the mean of its divisors is an integer number (427386041491).

Almost surely, 2^854772082981 is an apocalyptic number.

It is an amenable number.

854772082981 is a deficient number, since it is larger than the sum of its proper divisors (1).

854772082981 is an equidigital number, since it uses as much as digits as its factorization.

854772082981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18063360, while the sum is 61.

The spelling of 854772082981 in words is "eight hundred fifty-four billion, seven hundred seventy-two million, eighty-two thousand, nine hundred eighty-one".