256306025396 has 12 divisors (see below), whose sum is σ = 448539493920. Its totient is φ = 128151884280.

The previous prime is 256306025351. The next prime is 256306025399. The reversal of 256306025396 is 693520603652.

It is a self number, because there is not a number n which added to its sum of digits gives 256306025396.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256306025399) 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, 427001 + ... + 833631.

It is an arithmetic number, because the mean of its divisors is an integer number (37378291160).

Almost surely, 2^256306025396 is an apocalyptic number.

It is an amenable number.

256306025396 is a deficient number, since it is larger than the sum of its proper divisors (192233468524).

256306025396 is a wasteful number, since it uses less digits than its factorization.

256306025396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564214 (or 564212 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 47.

The spelling of 256306025396 in words is "two hundred fifty-six billion, three hundred six million, twenty-five thousand, three hundred ninety-six".