255555302789 has 2 divisors, whose sum is σ = 255555302790. Its totient is φ = 255555302788.

The previous prime is 255555302753. The next prime is 255555302803. The reversal of 255555302789 is 987203555552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219734062564 + 35821240225 = 468758^2 + 189265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255555302789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255555302089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127777651394 + 127777651395.

It is an arithmetic number, because the mean of its divisors is an integer number (127777651395).

Almost surely, 2^255555302789 is an apocalyptic number.

It is an amenable number.

255555302789 is a deficient number, since it is larger than the sum of its proper divisors (1).

255555302789 is an equidigital number, since it uses as much as digits as its factorization.

255555302789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900000, while the sum is 56.

The spelling of 255555302789 in words is "two hundred fifty-five billion, five hundred fifty-five million, three hundred two thousand, seven hundred eighty-nine".