261441642103 has 2 divisors, whose sum is σ = 261441642104. Its totient is φ = 261441642102.

The previous prime is 261441642083. The next prime is 261441642139. The reversal of 261441642103 is 301246144162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261441642103 - 2²⁹ = 260904771191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261442642103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130720821051 + 130720821052.

It is an arithmetic number, because the mean of its divisors is an integer number (130720821052).

Almost surely, 2^261441642103 is an apocalyptic number.

261441642103 is a deficient number, since it is larger than the sum of its proper divisors (1).

261441642103 is an equidigital number, since it uses as much as digits as its factorization.

261441642103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 34.

Adding to 261441642103 its reverse (301246144162), we get a palindrome (562687786265).

The spelling of 261441642103 in words is "two hundred sixty-one billion, four hundred forty-one million, six hundred forty-two thousand, one hundred three".