261276012066011 has 2 divisors, whose sum is σ = 261276012066012. Its totient is φ = 261276012066010.

The previous prime is 261276012065983. The next prime is 261276012066037. The reversal of 261276012066011 is 110660210672162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261276012066011 - 2¹⁰ = 261276012064987 is a prime.

It is a super-2 number, since 2×261276012066011² (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 261276012066011.

It is not a weakly prime, because it can be changed into another prime (261276012062011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130638006033005 + 130638006033006.

It is an arithmetic number, because the mean of its divisors is an integer number (130638006033006).

Almost surely, 2^{261276012066011} is an apocalyptic number.

261276012066011 is a deficient number, since it is larger than the sum of its proper divisors (1).

261276012066011 is an equidigital number, since it uses as much as digits as its factorization.

261276012066011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 261276012066011 in words is "two hundred sixty-one trillion, two hundred seventy-six billion, twelve million, sixty-six thousand, eleven".