261523002048559 has 2 divisors, whose sum is σ = 261523002048560. Its totient is φ = 261523002048558.

The previous prime is 261523002048491. The next prime is 261523002048593. The reversal of 261523002048559 is 955840200325162.

261523002048559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261523002048559 - 2¹¹ = 261523002046511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261523002045559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130761501024279 + 130761501024280.

It is an arithmetic number, because the mean of its divisors is an integer number (130761501024280).

Almost surely, 2^{261523002048559} is an apocalyptic number.

261523002048559 is a deficient number, since it is larger than the sum of its proper divisors (1).

261523002048559 is an equidigital number, since it uses as much as digits as its factorization.

261523002048559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184000, while the sum is 52.

The spelling of 261523002048559 in words is "two hundred sixty-one trillion, five hundred twenty-three billion, two million, forty-eight thousand, five hundred fifty-nine".