256875635242 has 8 divisors (see below), whose sum is σ = 385350430500. Its totient is φ = 128425491744.

The previous prime is 256875635227. The next prime is 256875635249. The reversal of 256875635242 is 242536578652.

256875635242 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 506829²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 256875635241 + 1 = 506829^2 + 1^2 .

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

It is not an unprimeable number, because it can be changed into a prime (256875635249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6136867 + ... + 6178582.

Almost surely, 2^256875635242 is an apocalyptic number.

256875635242 is a deficient number, since it is larger than the sum of its proper divisors (128474795258).

256875635242 is a wasteful number, since it uses less digits than its factorization.

256875635242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12325880.

The product of its digits is 24192000, while the sum is 55.

The spelling of 256875635242 in words is "two hundred fifty-six billion, eight hundred seventy-five million, six hundred thirty-five thousand, two hundred forty-two".