261845546353 has 2 divisors, whose sum is σ = 261845546354. Its totient is φ = 261845546352.

The previous prime is 261845546341. The next prime is 261845546407. The reversal of 261845546353 is 353645548162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148416021504 + 113429524849 = 385248^2 + 336793^2 .

It is a cyclic number.

It is not a de Polignac number, because 261845546353 - 2⁵ = 261845546321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261845546353.

It is not a weakly prime, because it can be changed into another prime (261845646353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130922773176 + 130922773177.

It is an arithmetic number, because the mean of its divisors is an integer number (130922773177).

Almost surely, 2^261845546353 is an apocalyptic number.

It is an amenable number.

261845546353 is a deficient number, since it is larger than the sum of its proper divisors (1).

261845546353 is an equidigital number, since it uses as much as digits as its factorization.

261845546353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368000, while the sum is 52.

The spelling of 261845546353 in words is "two hundred sixty-one billion, eight hundred forty-five million, five hundred forty-six thousand, three hundred fifty-three".