5285766782981 has 2 divisors, whose sum is σ = 5285766782982. Its totient is φ = 5285766782980.

The previous prime is 5285766782951. The next prime is 5285766783029. The reversal of 5285766782981 is 1892876675825.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2668599952225 + 2617166830756 = 1633585^2 + 1617766^2 .

It is a cyclic number.

It is not a de Polignac number, because 5285766782981 - 2²⁶ = 5285699674117 is a prime.

It is a super-2 number, since 2×5285766782981² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5285766782899 and 5285766782908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5285766782911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2642883391490 + 2642883391491.

It is an arithmetic number, because the mean of its divisors is an integer number (2642883391491).

Almost surely, 2^{5285766782981} is an apocalyptic number.

It is an amenable number.

5285766782981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5285766782981 is an equidigital number, since it uses as much as digits as its factorization.

5285766782981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 812851200, while the sum is 74.

The spelling of 5285766782981 in words is "five trillion, two hundred eighty-five billion, seven hundred sixty-six million, seven hundred eighty-two thousand, nine hundred eighty-one".