256915491348 has 12 divisors (see below), whose sum is σ = 599469479840. Its totient is φ = 85638497112.

The previous prime is 256915491341. The next prime is 256915491359. The reversal of 256915491348 is 843194519652.

256915491348 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256915491341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10704812128 + ... + 10704812151.

Almost surely, 2^256915491348 is an apocalyptic number.

It is an amenable number.

256915491348 is an abundant number, since it is smaller than the sum of its proper divisors (342553988492).

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

256915491348 is a wasteful number, since it uses less digits than its factorization.

256915491348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21409624286 (or 21409624284 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 57.

The spelling of 256915491348 in words is "two hundred fifty-six billion, nine hundred fifteen million, four hundred ninety-one thousand, three hundred forty-eight".