261676064570603 has 2 divisors, whose sum is σ = 261676064570604. Its totient is φ = 261676064570602.

The previous prime is 261676064570449. The next prime is 261676064570611. The reversal of 261676064570603 is 306075460676162.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261676064570603 is a prime.

It is not a weakly prime, because it can be changed into another prime (261676064570623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130838032285301 + 130838032285302.

It is an arithmetic number, because the mean of its divisors is an integer number (130838032285302).

Almost surely, 2^{261676064570603} is an apocalyptic number.

261676064570603 is a deficient number, since it is larger than the sum of its proper divisors (1).

261676064570603 is an equidigital number, since it uses as much as digits as its factorization.

261676064570603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45722880, while the sum is 59.

The spelling of 261676064570603 in words is "two hundred sixty-one trillion, six hundred seventy-six billion, sixty-four million, five hundred seventy thousand, six hundred three".