255278025439 has 2 divisors, whose sum is σ = 255278025440. Its totient is φ = 255278025438.

The previous prime is 255278025433. The next prime is 255278025449. The reversal of 255278025439 is 934520872552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255278025439 - 2³¹ = 253130541791 is a prime.

It is a super-2 number, since 2×255278025439² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255278025433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127639012719 + 127639012720.

It is an arithmetic number, because the mean of its divisors is an integer number (127639012720).

Almost surely, 2^255278025439 is an apocalyptic number.

255278025439 is a deficient number, since it is larger than the sum of its proper divisors (1).

255278025439 is an equidigital number, since it uses as much as digits as its factorization.

255278025439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048000, while the sum is 52.

The spelling of 255278025439 in words is "two hundred fifty-five billion, two hundred seventy-eight million, twenty-five thousand, four hundred thirty-nine".