261671104099 has 2 divisors, whose sum is σ = 261671104100. Its totient is φ = 261671104098.

The previous prime is 261671104073. The next prime is 261671104159. The reversal of 261671104099 is 990401176162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261671104099 - 2¹⁷ = 261670973027 is a prime.

It is not a weakly prime, because it can be changed into another prime (261671174099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130835552049 + 130835552050.

It is an arithmetic number, because the mean of its divisors is an integer number (130835552050).

Almost surely, 2^261671104099 is an apocalyptic number.

261671104099 is a deficient number, since it is larger than the sum of its proper divisors (1).

261671104099 is an equidigital number, since it uses as much as digits as its factorization.

261671104099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 261671104099 in words is "two hundred sixty-one billion, six hundred seventy-one million, one hundred four thousand, ninety-nine".