261344514353 has 4 divisors (see below), whose sum is σ = 281447938548. Its totient is φ = 241241090160.

The previous prime is 261344514289. The next prime is 261344514413. The reversal of 261344514353 is 353415443162.

It is a happy number.

261344514353 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87582259249 + 173762255104 = 295943^2 + 416848^2 .

It is a cyclic number.

It is not a de Polignac number, because 261344514353 - 2⁶ = 261344514289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 261344514353.

It is not an unprimeable number, because it can be changed into a prime (261344510353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10051712078 + ... + 10051712103.

It is an arithmetic number, because the mean of its divisors is an integer number (70361984637).

Almost surely, 2^261344514353 is an apocalyptic number.

It is an amenable number.

261344514353 is a deficient number, since it is larger than the sum of its proper divisors (20103424195).

261344514353 is a wasteful number, since it uses less digits than its factorization.

261344514353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20103424194.

The product of its digits is 518400, while the sum is 41.

The spelling of 261344514353 in words is "two hundred sixty-one billion, three hundred forty-four million, five hundred fourteen thousand, three hundred fifty-three".