280275307661 has 2 divisors, whose sum is σ = 280275307662. Its totient is φ = 280275307660.

The previous prime is 280275307531. The next prime is 280275307699. The reversal of 280275307661 is 166703572082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177350476900 + 102924830761 = 421130^2 + 320819^2 .

It is a cyclic number.

It is not a de Polignac number, because 280275307661 - 2¹⁰ = 280275306637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280275307061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140137653830 + 140137653831.

It is an arithmetic number, because the mean of its divisors is an integer number (140137653831).

Almost surely, 2^280275307661 is an apocalyptic number.

It is an amenable number.

280275307661 is a deficient number, since it is larger than the sum of its proper divisors (1).

280275307661 is an equidigital number, since it uses as much as digits as its factorization.

280275307661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 280275307661 in words is "two hundred eighty billion, two hundred seventy-five million, three hundred seven thousand, six hundred sixty-one".