255021585811 has 2 divisors, whose sum is σ = 255021585812. Its totient is φ = 255021585810.

The previous prime is 255021585787. The next prime is 255021585817. The reversal of 255021585811 is 118585120552.

It is a happy number.

255021585811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255021585811 - 2¹⁷ = 255021454739 is a prime.

It is not a weakly prime, because it can be changed into another prime (255021585817) 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, 127510792905 + 127510792906.

It is an arithmetic number, because the mean of its divisors is an integer number (127510792906).

Almost surely, 2^255021585811 is an apocalyptic number.

255021585811 is a deficient number, since it is larger than the sum of its proper divisors (1).

255021585811 is an equidigital number, since it uses as much as digits as its factorization.

255021585811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160000, while the sum is 43.

The spelling of 255021585811 in words is "two hundred fifty-five billion, twenty-one million, five hundred eighty-five thousand, eight hundred eleven".