256025281156 has 12 divisors (see below), whose sum is σ = 448268614668. Its totient is φ = 127948534112.

The previous prime is 256025281153. The next prime is 256025281163. The reversal of 256025281156 is 651182520652.

It can be written as a sum of positive squares in 2 ways, for example, as 135210644100 + 120814637056 = 367710^2 + 347584^2 .

It is not an unprimeable number, because it can be changed into a prime (256025281153) 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, 16017631 + ... + 16033606.

It is an arithmetic number, because the mean of its divisors is an integer number (37355717889).

Almost surely, 2^256025281156 is an apocalyptic number.

It is an amenable number.

256025281156 is a deficient number, since it is larger than the sum of its proper divisors (192243333512).

256025281156 is a wasteful number, since it uses less digits than its factorization.

256025281156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32053238 (or 32053236 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 43.

The spelling of 256025281156 in words is "two hundred fifty-six billion, twenty-five million, two hundred eighty-one thousand, one hundred fifty-six".