257808255055 has 16 divisors (see below), whose sum is σ = 333188440704. Its totient is φ = 190369566720.

The previous prime is 257808255053. The next prime is 257808255071. The reversal of 257808255055 is 550552808752.

It is a happy number.

It is not a de Polignac number, because 257808255055 - 2¹ = 257808255053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257808254993 and 257808255011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257808255053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1000335 + ... + 1231375.

It is an arithmetic number, because the mean of its divisors is an integer number (20824277544).

Almost surely, 2^257808255055 is an apocalyptic number.

257808255055 is a deficient number, since it is larger than the sum of its proper divisors (75380185649).

257808255055 is a wasteful number, since it uses less digits than its factorization.

257808255055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248226.

The product of its (nonzero) digits is 5600000, while the sum is 52.

The spelling of 257808255055 in words is "two hundred fifty-seven billion, eight hundred eight million, two hundred fifty-five thousand, fifty-five".