256881223630 has 8 divisors (see below), whose sum is σ = 462386202552. Its totient is φ = 102752489448.

The previous prime is 256881223607. The next prime is 256881223639. The reversal of 256881223630 is 36322188652.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256881223639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12844061172 + ... + 12844061191.

It is an arithmetic number, because the mean of its divisors is an integer number (57798275319).

Almost surely, 2^256881223630 is an apocalyptic number.

256881223630 is a deficient number, since it is larger than the sum of its proper divisors (205504978922).

256881223630 is a wasteful number, since it uses less digits than its factorization.

256881223630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25688122370.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 256881223630 in words is "two hundred fifty-six billion, eight hundred eighty-one million, two hundred twenty-three thousand, six hundred thirty".