261564200516711 has 2 divisors, whose sum is σ = 261564200516712. Its totient is φ = 261564200516710.

The previous prime is 261564200516653. The next prime is 261564200516789. The reversal of 261564200516711 is 117615002465162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261564200516711 - 2⁴⁶ = 191195456339047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261564202516711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130782100258355 + 130782100258356.

It is an arithmetic number, because the mean of its divisors is an integer number (130782100258356).

Almost surely, 2^{261564200516711} is an apocalyptic number.

261564200516711 is a deficient number, since it is larger than the sum of its proper divisors (1).

261564200516711 is an equidigital number, since it uses as much as digits as its factorization.

261564200516711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 261564200516711 in words is "two hundred sixty-one trillion, five hundred sixty-four billion, two hundred million, five hundred sixteen thousand, seven hundred eleven".