2685117481 has 2 divisors, whose sum is σ = 2685117482. Its totient is φ = 2685117480.

The previous prime is 2685117361. The next prime is 2685117509. The reversal of 2685117481 is 1847115862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2071069081 + 614048400 = 45509^2 + 24780^2 .

It is a cyclic number.

It is not a de Polignac number, because 2685117481 - 2⁷ = 2685117353 is a prime.

It is a super-2 number, since 2×2685117481² = 14419711773543570722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2685117781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1342558740 + 1342558741.

It is an arithmetic number, because the mean of its divisors is an integer number (1342558741).

Almost surely, 2^2685117481 is an apocalyptic number.

It is an amenable number.

2685117481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2685117481 is an equidigital number, since it uses as much as digits as its factorization.

2685117481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 43.

The square root of 2685117481 is about 51818.1192344917. The cubic root of 2685117481 is about 1389.9134706241.

The spelling of 2685117481 in words is "two billion, six hundred eighty-five million, one hundred seventeen thousand, four hundred eighty-one".