261063535013 has 8 divisors (see below), whose sum is σ = 267466774680. Its totient is φ = 254662001920.

The previous prime is 261063534997. The next prime is 261063535039. The reversal of 261063535013 is 310535360162.

261063535013 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 4 ways, for example, as 35911387009 + 225152148004 = 189503^2 + 474502^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261063535013 - 2⁴ = 261063534997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261063535093) 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 7 ways as a sum of consecutive naturals, for example, 114170 + ... + 731547.

It is an arithmetic number, because the mean of its divisors is an integer number (33433346835).

Almost surely, 2^261063535013 is an apocalyptic number.

It is an amenable number.

261063535013 is a deficient number, since it is larger than the sum of its proper divisors (6403239667).

261063535013 is an equidigital number, since it uses as much as digits as its factorization.

261063535013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853287.

The product of its (nonzero) digits is 48600, while the sum is 35.

Adding to 261063535013 its reverse (310535360162), we get a palindrome (571598895175).

The spelling of 261063535013 in words is "two hundred sixty-one billion, sixty-three million, five hundred thirty-five thousand, thirteen".