256925489280 has 64 divisors (see below), whose sum is σ = 818950003200. Its totient is φ = 68513463296.

The previous prime is 256925489269. The next prime is 256925489321. The reversal of 256925489280 is 82984529652.

It is a happy number.

256925489280 is digitally balanced in base 3, 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 (64).

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66905760 + ... + 66909599.

It is an arithmetic number, because the mean of its divisors is an integer number (12796093800).

Almost surely, 2^256925489280 is an apocalyptic number.

256925489280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256925489280 is an abundant number, since it is smaller than the sum of its proper divisors (562024513920).

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

256925489280 is a wasteful number, since it uses less digits than its factorization.

256925489280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133815381 (or 133815369 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 60.

The spelling of 256925489280 in words is "two hundred fifty-six billion, nine hundred twenty-five million, four hundred eighty-nine thousand, two hundred eighty".