275995721281 has 16 divisors (see below), whose sum is σ = 320746062208. Its totient is φ = 232579641600.

The previous prime is 275995721257. The next prime is 275995721329. The reversal of 275995721281 is 182127599572.

It is a 4-Lehmer number, since φ(275995721281) divides (275995721281-1)⁴.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 275995721281 - 2⁹ = 275995720769 is a prime.

It is a super-2 number, since 2×275995721281² (a number of 24 digits) contains 22 as substring.

It is a deceptive number, since it divides R_275995721280.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (275995721201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 758281 + ... + 1061593.

It is an arithmetic number, because the mean of its divisors is an integer number (20046628888).

It is a Poulet number, since it divides 2^275995721280-1.

Almost surely, 2^275995721281 is an apocalyptic number.

275995721281 is the 303313-rd octagonal number.

It is an amenable number.

275995721281 is a deficient number, since it is larger than the sum of its proper divisors (44750340927).

275995721281 is a wasteful number, since it uses less digits than its factorization.

275995721281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305512.

The product of its digits is 6350400, while the sum is 58.

The spelling of 275995721281 in words is "two hundred seventy-five billion, nine hundred ninety-five million, seven hundred twenty-one thousand, two hundred eighty-one".