261343700315011 has 2 divisors, whose sum is σ = 261343700315012. Its totient is φ = 261343700315010.

The previous prime is 261343700314891. The next prime is 261343700315021. The reversal of 261343700315011 is 110513007343162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261343700315011 - 2¹⁷ = 261343700183939 is a prime.

It is not a weakly prime, because it can be changed into another prime (261343700315021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130671850157505 + 130671850157506.

It is an arithmetic number, because the mean of its divisors is an integer number (130671850157506).

Almost surely, 2^{261343700315011} is an apocalyptic number.

261343700315011 is a deficient number, since it is larger than the sum of its proper divisors (1).

261343700315011 is an equidigital number, since it uses as much as digits as its factorization.

261343700315011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

Adding to 261343700315011 its reverse (110513007343162), we get a palindrome (371856707658173).

The spelling of 261343700315011 in words is "two hundred sixty-one trillion, three hundred forty-three billion, seven hundred million, three hundred fifteen thousand, eleven".