256257512304423 has 128 divisors (see below), whose sum is σ = 402308973158400. Its totient is φ = 142088933376000.

The previous prime is 256257512304317. The next prime is 256257512304427. The reversal of 256257512304423 is 324403215752652.

It is not a de Polignac number, because 256257512304423 - 2¹² = 256257512300327 is a prime.

It is a super-2 number, since 2×256257512304423² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256257512304427) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 14908218313 + ... + 14908235501.

It is an arithmetic number, because the mean of its divisors is an integer number (3143038852800).

Almost surely, 2^{256257512304423} is an apocalyptic number.

256257512304423 is a deficient number, since it is larger than the sum of its proper divisors (146051460853977).

256257512304423 is a wasteful number, since it uses less digits than its factorization.

256257512304423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18033.

The product of its (nonzero) digits is 12096000, while the sum is 51.

The spelling of 256257512304423 in words is "two hundred fifty-six trillion, two hundred fifty-seven billion, five hundred twelve million, three hundred four thousand, four hundred twenty-three".