261535122415363 has 2 divisors, whose sum is σ = 261535122415364. Its totient is φ = 261535122415362.

The previous prime is 261535122415361. The next prime is 261535122415381. The reversal of 261535122415363 is 363514221535162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261535122415363 - 2¹ = 261535122415361 is a prime.

Together with 261535122415361, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (261535122415361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130767561207681 + 130767561207682.

It is an arithmetic number, because the mean of its divisors is an integer number (130767561207682).

Almost surely, 2^{261535122415363} is an apocalyptic number.

261535122415363 is a deficient number, since it is larger than the sum of its proper divisors (1).

261535122415363 is an equidigital number, since it uses as much as digits as its factorization.

261535122415363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888000, while the sum is 49.

The spelling of 261535122415363 in words is "two hundred sixty-one trillion, five hundred thirty-five billion, one hundred twenty-two million, four hundred fifteen thousand, three hundred sixty-three".