256041365136 has 80 divisors (see below), whose sum is σ = 677210614080. Its totient is φ = 83314506240.

The previous prime is 256041365101. The next prime is 256041365147. The reversal of 256041365136 is 631563140652.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3657826 + ... + 3727166.

It is an arithmetic number, because the mean of its divisors is an integer number (8465132676).

Almost surely, 2^256041365136 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 256041365136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338605307040).

256041365136 is an abundant number, since it is smaller than the sum of its proper divisors (421169248944).

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

256041365136 is a wasteful number, since it uses less digits than its factorization.

256041365136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71184 (or 71178 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 256041365136 in words is "two hundred fifty-six billion, forty-one million, three hundred sixty-five thousand, one hundred thirty-six".