255461777 has 2 divisors, whose sum is σ = 255461778. Its totient is φ = 255461776.

The previous prime is 255461743. The next prime is 255461797. The reversal of 255461777 is 777164552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241615936 + 13845841 = 15544^2 + 3721^2 .

It is a cyclic number.

It is not a de Polignac number, because 255461777 - 2¹² = 255457681 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (255461797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127730888 + 127730889.

It is an arithmetic number, because the mean of its divisors is an integer number (127730889).

Almost surely, 2^255461777 is an apocalyptic number.

It is an amenable number.

255461777 is a deficient number, since it is larger than the sum of its proper divisors (1).

255461777 is an equidigital number, since it uses as much as digits as its factorization.

255461777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 411600, while the sum is 44.

The square root of 255461777 is about 15983.1716814905. The cubic root of 255461777 is about 634.5151211973.

The spelling of 255461777 in words is "two hundred fifty-five million, four hundred sixty-one thousand, seven hundred seventy-seven".