255778357 has 2 divisors, whose sum is σ = 255778358. Its totient is φ = 255778356.

The previous prime is 255778351. The next prime is 255778363. The reversal of 255778357 is 753877552.

It is a balanced prime because it is at equal distance from previous prime (255778351) and next prime (255778363).

It can be written as a sum of positive squares in only one way, i.e., 249829636 + 5948721 = 15806^2 + 2439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255778357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255778357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255778351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127889178 + 127889179.

It is an arithmetic number, because the mean of its divisors is an integer number (127889179).

Almost surely, 2^255778357 is an apocalyptic number.

It is an amenable number.

255778357 is a deficient number, since it is larger than the sum of its proper divisors (1).

255778357 is an equidigital number, since it uses as much as digits as its factorization.

255778357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2058000, while the sum is 49.

The square root of 255778357 is about 15993.0721564057. The cubic root of 255778357 is about 634.7771197876. Note that the first 3 decimals are identical.

The spelling of 255778357 in words is "two hundred fifty-five million, seven hundred seventy-eight thousand, three hundred fifty-seven".