261314580758281 has 2 divisors, whose sum is σ = 261314580758282. Its totient is φ = 261314580758280.

The previous prime is 261314580758239. The next prime is 261314580758447. The reversal of 261314580758281 is 182857085413162.

261314580758281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168882604394256 + 92431976364025 = 12995484^2 + 9614155^2 .

It is a cyclic number.

It is not a de Polignac number, because 261314580758281 - 2¹⁷ = 261314580627209 is a prime.

It is a super-2 number, since 2×261314580758281² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (261314580798281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130657290379140 + 130657290379141.

It is an arithmetic number, because the mean of its divisors is an integer number (130657290379141).

Almost surely, 2^{261314580758281} is an apocalyptic number.

It is an amenable number.

261314580758281 is a deficient number, since it is larger than the sum of its proper divisors (1).

261314580758281 is an equidigital number, since it uses as much as digits as its factorization.

261314580758281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25804800, while the sum is 61.

The spelling of 261314580758281 in words is "two hundred sixty-one trillion, three hundred fourteen billion, five hundred eighty million, seven hundred fifty-eight thousand, two hundred eighty-one".