255300061561 has 2 divisors, whose sum is σ = 255300061562. Its totient is φ = 255300061560.

The previous prime is 255300061483. The next prime is 255300061573. The reversal of 255300061561 is 165160003552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191874661225 + 63425400336 = 438035^2 + 251844^2 .

It is a cyclic number.

It is not a de Polignac number, because 255300061561 - 2¹¹ = 255300059513 is a prime.

It is not a weakly prime, because it can be changed into another prime (255300161561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127650030780 + 127650030781.

It is an arithmetic number, because the mean of its divisors is an integer number (127650030781).

Almost surely, 2^255300061561 is an apocalyptic number.

It is an amenable number.

255300061561 is a deficient number, since it is larger than the sum of its proper divisors (1).

255300061561 is an equidigital number, since it uses as much as digits as its factorization.

255300061561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 34.

The spelling of 255300061561 in words is "two hundred fifty-five billion, three hundred million, sixty-one thousand, five hundred sixty-one".