281271776405461 has 2 divisors, whose sum is σ = 281271776405462. Its totient is φ = 281271776405460.

The previous prime is 281271776405453. The next prime is 281271776405483. The reversal of 281271776405461 is 164504677172182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202250521833361 + 79021254572100 = 14221481^2 + 8889390^2 .

It is a cyclic number.

It is not a de Polignac number, because 281271776405461 - 2³ = 281271776405453 is a prime.

It is a super-2 number, since 2×281271776405461² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 281271776405461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281271776405161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140635888202730 + 140635888202731.

It is an arithmetic number, because the mean of its divisors is an integer number (140635888202731).

Almost surely, 2^{281271776405461} is an apocalyptic number.

It is an amenable number.

281271776405461 is a deficient number, since it is larger than the sum of its proper divisors (1).

281271776405461 is an equidigital number, since it uses as much as digits as its factorization.

281271776405461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31610880, while the sum is 61.

The spelling of 281271776405461 in words is "two hundred eighty-one trillion, two hundred seventy-one billion, seven hundred seventy-six million, four hundred five thousand, four hundred sixty-one".