255783641 has 2 divisors, whose sum is σ = 255783642. Its totient is φ = 255783640.

The previous prime is 255783617. The next prime is 255783653. The reversal of 255783641 is 146387552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171217225 + 84566416 = 13085^2 + 9196^2 .

It is a cyclic number.

It is not a de Polignac number, because 255783641 - 2²⁶ = 188674777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (255783691) 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, 127891820 + 127891821.

It is an arithmetic number, because the mean of its divisors is an integer number (127891821).

Almost surely, 2^255783641 is an apocalyptic number.

It is an amenable number.

255783641 is a deficient number, since it is larger than the sum of its proper divisors (1).

255783641 is an equidigital number, since it uses as much as digits as its factorization.

255783641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 41.

The square root of 255783641 is about 15993.2373520810. The cubic root of 255783641 is about 634.7814909409.

The spelling of 255783641 in words is "two hundred fifty-five million, seven hundred eighty-three thousand, six hundred forty-one".