255690577 has 2 divisors, whose sum is σ = 255690578. Its totient is φ = 255690576.

The previous prime is 255690569. The next prime is 255690583. The reversal of 255690577 is 775096552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237036816 + 18653761 = 15396^2 + 4319^2 .

It is a cyclic number.

It is not a de Polignac number, because 255690577 - 2³ = 255690569 is a prime.

It is not a weakly prime, because it can be changed into another prime (255690587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127845288 + 127845289.

It is an arithmetic number, because the mean of its divisors is an integer number (127845289).

Almost surely, 2^255690577 is an apocalyptic number.

It is an amenable number.

255690577 is a deficient number, since it is larger than the sum of its proper divisors (1).

255690577 is an equidigital number, since it uses as much as digits as its factorization.

255690577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 661500, while the sum is 46.

The square root of 255690577 is about 15990.3276076508. The cubic root of 255690577 is about 634.7044955676.

The spelling of 255690577 in words is "two hundred fifty-five million, six hundred ninety thousand, five hundred seventy-seven".