256742610325 has 6 divisors (see below), whose sum is σ = 318360836834. Its totient is φ = 205394088240.

The previous prime is 256742610317. The next prime is 256742610331. The reversal of 256742610325 is 523016247652.

It can be written as a sum of positive squares in 3 ways, for example, as 5013631249 + 251728979076 = 70807^2 + 501726^2 .

It is not a de Polignac number, because 256742610325 - 2³ = 256742610317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5134852182 + ... + 5134852231.

Almost surely, 2^256742610325 is an apocalyptic number.

256742610325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256742610325 is a deficient number, since it is larger than the sum of its proper divisors (61618226509).

256742610325 is a wasteful number, since it uses less digits than its factorization.

256742610325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10269704423 (or 10269704418 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 43.

Adding to 256742610325 its reverse (523016247652), we get a palindrome (779758857977).

The spelling of 256742610325 in words is "two hundred fifty-six billion, seven hundred forty-two million, six hundred ten thousand, three hundred twenty-five".