255917054839 has 2 divisors, whose sum is σ = 255917054840. Its totient is φ = 255917054838.

The previous prime is 255917054821. The next prime is 255917054891. The reversal of 255917054839 is 938450719552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255917054839 - 2¹³ = 255917046647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255917054339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127958527419 + 127958527420.

It is an arithmetic number, because the mean of its divisors is an integer number (127958527420).

Almost surely, 2^255917054839 is an apocalyptic number.

255917054839 is a deficient number, since it is larger than the sum of its proper divisors (1).

255917054839 is an equidigital number, since it uses as much as digits as its factorization.

255917054839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608000, while the sum is 58.

The spelling of 255917054839 in words is "two hundred fifty-five billion, nine hundred seventeen million, fifty-four thousand, eight hundred thirty-nine".