255645877 has 2 divisors, whose sum is σ = 255645878. Its totient is φ = 255645876.

The previous prime is 255645833. The next prime is 255645899. The reversal of 255645877 is 778546552.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155525841 + 100120036 = 12471^2 + 10006^2 .

It is a cyclic number.

It is not a de Polignac number, because 255645877 - 2⁷ = 255645749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255645877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255645077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127822938 + 127822939.

It is an arithmetic number, because the mean of its divisors is an integer number (127822939).

Almost surely, 2^255645877 is an apocalyptic number.

It is an amenable number.

255645877 is a deficient number, since it is larger than the sum of its proper divisors (1).

255645877 is an equidigital number, since it uses as much as digits as its factorization.

255645877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2352000, while the sum is 49.

The square root of 255645877 is about 15988.9298266019. The cubic root of 255645877 is about 634.6675069220.

The spelling of 255645877 in words is "two hundred fifty-five million, six hundred forty-five thousand, eight hundred seventy-seven".