261535060773271 has 2 divisors, whose sum is σ = 261535060773272. Its totient is φ = 261535060773270.

The previous prime is 261535060773209. The next prime is 261535060773289. The reversal of 261535060773271 is 172377060535162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261535060773271 - 2²³ = 261535052384663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261535060773871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130767530386635 + 130767530386636.

It is an arithmetic number, because the mean of its divisors is an integer number (130767530386636).

Almost surely, 2^{261535060773271} is an apocalyptic number.

261535060773271 is a deficient number, since it is larger than the sum of its proper divisors (1).

261535060773271 is an equidigital number, since it uses as much as digits as its factorization.

261535060773271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11113200, while the sum is 55.

The spelling of 261535060773271 in words is "two hundred sixty-one trillion, five hundred thirty-five billion, sixty million, seven hundred seventy-three thousand, two hundred seventy-one".