256826311125 has 16 divisors (see below), whose sum is σ = 427358982336. Its totient is φ = 136974032400.

The previous prime is 256826311067. The next prime is 256826311127. The reversal of 256826311125 is 521113628652.

It is not a de Polignac number, because 256826311125 - 2⁸ = 256826310869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256826311127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342434707 + ... + 342435456.

It is an arithmetic number, because the mean of its divisors is an integer number (26709936396).

Almost surely, 2^256826311125 is an apocalyptic number.

256826311125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256826311125 is a deficient number, since it is larger than the sum of its proper divisors (170532671211).

256826311125 is an equidigital number, since it uses as much as digits as its factorization.

256826311125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684870181 (or 684870171 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

Adding to 256826311125 its reverse (521113628652), we get a palindrome (777939939777).

The spelling of 256826311125 in words is "two hundred fifty-six billion, eight hundred twenty-six million, three hundred eleven thousand, one hundred twenty-five".