256506101056 has 14 divisors (see below), whose sum is σ = 509004294410. Its totient is φ = 128253050496.

The previous prime is 256506101029. The next prime is 256506101057. The reversal of 256506101056 is 650101605652.

It can be written as a sum of positive squares in only one way, i.e., 252204840000 + 4301261056 = 502200^2 + 65584^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256506101057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2003953851 + ... + 2003953978.

Almost surely, 2^256506101056 is an apocalyptic number.

It is an amenable number.

256506101056 is a deficient number, since it is larger than the sum of its proper divisors (252498193354).

256506101056 is an equidigital number, since it uses as much as digits as its factorization.

256506101056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4007907841 (or 4007907831 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 256506101056 in words is "two hundred fifty-six billion, five hundred six million, one hundred one thousand, fifty-six".