256299296281 has 8 divisors (see below), whose sum is σ = 310143686400. Its totient is φ = 206762457408.

The previous prime is 256299296269. The next prime is 256299296353. The reversal of 256299296281 is 182692992652.

256299296281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256299296281 - 2³³ = 247709361689 is a prime.

It is a super-3 number, since 3×256299296281³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256299296221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1076887681 + ... + 1076887918.

It is an arithmetic number, because the mean of its divisors is an integer number (38767960800).

Almost surely, 2^256299296281 is an apocalyptic number.

It is an amenable number.

256299296281 is a deficient number, since it is larger than the sum of its proper divisors (53844390119).

256299296281 is a wasteful number, since it uses less digits than its factorization.

256299296281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2153775623.

The product of its digits is 16796160, while the sum is 61.

The spelling of 256299296281 in words is "two hundred fifty-six billion, two hundred ninety-nine million, two hundred ninety-six thousand, two hundred eighty-one".