255558257525 has 12 divisors (see below), whose sum is σ = 316912863972. Its totient is φ = 204433299840.

The previous prime is 255558257497. The next prime is 255558257623. The reversal of 255558257525 is 525752855552.

It can be written as a sum of positive squares in 6 ways, for example, as 30178290961 + 225379966564 = 173719^2 + 474742^2 .

It is not a de Polignac number, because 255558257525 - 2¹⁶ = 255558191989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68639 + ... + 718211.

It is an arithmetic number, because the mean of its divisors is an integer number (26409405331).

Almost surely, 2^255558257525 is an apocalyptic number.

255558257525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

255558257525 is a deficient number, since it is larger than the sum of its proper divisors (61354606447).

255558257525 is a wasteful number, since it uses less digits than its factorization.

255558257525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665320 (or 665315 counting only the distinct ones).

The product of its digits is 35000000, while the sum is 56.

The spelling of 255558257525 in words is "two hundred fifty-five billion, five hundred fifty-eight million, two hundred fifty-seven thousand, five hundred twenty-five".