261533456044313 has 6 divisors (see below), whose sum is σ = 263053948618494. Its totient is φ = 260021701933376.

The previous prime is 261533456044307. The next prime is 261533456044339. The reversal of 261533456044313 is 313440654335162.

261533456044313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 185103426193984 + 76430029850329 = 13605272^2 + 8742427^2 .

It is not a de Polignac number, because 261533456044313 - 2¹² = 261533456040217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (261533456044303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4369201520 + ... + 4369261377.

It is an arithmetic number, because the mean of its divisors is an integer number (43842324769749).

Almost surely, 2^{261533456044313} is an apocalyptic number.

It is an amenable number.

261533456044313 is a deficient number, since it is larger than the sum of its proper divisors (1520492574181).

261533456044313 is an frugal number, since it uses more digits than its factorization.

261533456044313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8738463243 (or 8738463070 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 50.

The spelling of 261533456044313 in words is "two hundred sixty-one trillion, five hundred thirty-three billion, four hundred fifty-six million, forty-four thousand, three hundred thirteen".