256305042325 has 12 divisors (see below), whose sum is σ = 320138098020. Its totient is φ = 203547359360.

The previous prime is 256305042317. The next prime is 256305042403. The reversal of 256305042325 is 523240503652.

It can be written as a sum of positive squares in 6 ways, for example, as 699972849 + 255605069476 = 26457^2 + 505574^2 .

It is not a de Polignac number, because 256305042325 - 2³ = 256305042317 is a prime.

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, 37413370 + ... + 37420219.

It is an arithmetic number, because the mean of its divisors is an integer number (26678174835).

Almost surely, 2^256305042325 is an apocalyptic number.

256305042325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256305042325 is a deficient number, since it is larger than the sum of its proper divisors (63833055695).

256305042325 is a wasteful number, since it uses less digits than its factorization.

256305042325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74833736 (or 74833731 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 37.

Adding to 256305042325 its reverse (523240503652), we get a palindrome (779545545977).

The spelling of 256305042325 in words is "two hundred fifty-six billion, three hundred five million, forty-two thousand, three hundred twenty-five".