275791975281 has 135 divisors (see below), whose sum is σ = 448525400169. Its totient is φ = 168865926768.

The previous prime is 275791975247. The next prime is 275791975297. The reversal of 275791975281 is 182579197572.

The square root of 275791975281 is 525159.

It is a perfect power (a square), and thus also a powerful number.

275791975281 is a `hidden beast` number, since 2 + 7 + 579 + 1 + 9 + 7 + 52 + 8 + 1 = 666.

It is not a de Polignac number, because 275791975281 - 2¹³ = 275791967089 is a prime.

It is a super-3 number, since 3×275791975281³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (275791975201) 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 134 ways as a sum of consecutive naturals, for example, 4674440230 + ... + 4674440288.

Almost surely, 2^275791975281 is an apocalyptic number.

275791975281 is the 525159-th square number.

275791975281 is the 262580-th centered octagonal number.

It is an amenable number.

275791975281 is a deficient number, since it is larger than the sum of its proper divisors (172733424888).

275791975281 is an frugal number, since it uses more digits than its factorization.

275791975281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 128 counting only the distinct ones).

The product of its digits is 22226400, while the sum is 63.

The spelling of 275791975281 in words is "two hundred seventy-five billion, seven hundred ninety-one million, nine hundred seventy-five thousand, two hundred eighty-one".