275485816181 has 16 divisors (see below), whose sum is σ = 283373700720. Its totient is φ = 267720837120.

The previous prime is 275485816159. The next prime is 275485816189. The reversal of 275485816181 is 181618584572.

It can be written as a sum of positive squares in 8 ways, for example, as 11280564100 + 264205252081 = 106210^2 + 514009^2 .

It is a cyclic number.

It is not a de Polignac number, because 275485816181 - 2³⁰ = 274412074357 is a prime.

It is a super-2 number, since 2×275485816181² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275485816189) 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 in 15 ways as a sum of consecutive naturals, for example, 2288411 + ... + 2405783.

It is an arithmetic number, because the mean of its divisors is an integer number (17710856295).

Almost surely, 2^275485816181 is an apocalyptic number.

It is an amenable number.

275485816181 is a deficient number, since it is larger than the sum of its proper divisors (7887884539).

275485816181 is a wasteful number, since it uses less digits than its factorization.

275485816181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117896.

The product of its digits is 4300800, while the sum is 56.

The spelling of 275485816181 in words is "two hundred seventy-five billion, four hundred eighty-five million, eight hundred sixteen thousand, one hundred eighty-one".