206561150452511 has 2 divisors, whose sum is σ = 206561150452512. Its totient is φ = 206561150452510.

The previous prime is 206561150452471. The next prime is 206561150452561. The reversal of 206561150452511 is 115254051165602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206561150452511 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206561150452561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103280575226255 + 103280575226256.

It is an arithmetic number, because the mean of its divisors is an integer number (103280575226256).

Almost surely, 2^{206561150452511} is an apocalyptic number.

206561150452511 is a deficient number, since it is larger than the sum of its proper divisors (1).

206561150452511 is an equidigital number, since it uses as much as digits as its factorization.

206561150452511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360000, while the sum is 44.

The spelling of 206561150452511 in words is "two hundred six trillion, five hundred sixty-one billion, one hundred fifty million, four hundred fifty-two thousand, five hundred eleven".