256655524621434 has 8 divisors (see below), whose sum is σ = 513311049242880. Its totient is φ = 85551841540476.

The previous prime is 256655524621411. The next prime is 256655524621439. The reversal of 256655524621434 is 434126425556652.

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

256655524621434 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (256655524621439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21387960385114 + ... + 21387960385125.

It is an arithmetic number, because the mean of its divisors is an integer number (64163881155360).

Almost surely, 2^{256655524621434} is an apocalyptic number.

256655524621434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256655524621434 is a wasteful number, since it uses less digits than its factorization.

256655524621434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42775920770244.

The product of its digits is 207360000, while the sum is 60.

The spelling of 256655524621434 in words is "two hundred fifty-six trillion, six hundred fifty-five billion, five hundred twenty-four million, six hundred twenty-one thousand, four hundred thirty-four".