256859144724 has 144 divisors (see below), whose sum is σ = 747041487360. Its totient is φ = 67255194240.

The previous prime is 256859144681. The next prime is 256859144747. The reversal of 256859144724 is 427441958652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1908159 + ... + 2038329.

Almost surely, 2^256859144724 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256859144724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (373520743680).

256859144724 is an abundant number, since it is smaller than the sum of its proper divisors (490182342636).

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

256859144724 is a wasteful number, since it uses less digits than its factorization.

256859144724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130350 (or 130335 counting only the distinct ones).

The product of its digits is 19353600, while the sum is 57.

The spelling of 256859144724 in words is "two hundred fifty-six billion, eight hundred fifty-nine million, one hundred forty-four thousand, seven hundred twenty-four".